If you’ve just found out you’re pregnant, or you think you might be, the first weeks can feel like an overwhelming mix of excitement and uncertainty. A missed period is usually the earliest clue, but your body starts sending signals even before that. Here’s what to expect, what to do first, and how to take care of yourself through the months ahead.
Early Signs That You’re Pregnant
A missed period is the most obvious sign, but it’s rarely the only one. Hormonal shifts begin almost immediately after conception, and they trigger a cascade of physical changes that can catch you off guard.
Morning sickness, despite its name, can hit at any hour. It typically starts between weeks 4 and 9 and ranges from mild queasiness to frequent vomiting. Around the same time, your breasts may feel tender, swollen, or unusually sensitive. Fatigue is another hallmark of early pregnancy. Rising progesterone levels can make you feel exhausted even if you slept well. You may also notice you’re urinating more often than usual, even this early on.
Other common first-trimester symptoms include heartburn (because pregnancy hormones slow digestion), constipation, and sudden shifts in food preferences. Cravings and aversions to certain foods or smells are normal and can change from week to week. Not everyone experiences every symptom, and intensity varies widely. A home pregnancy test taken after a missed period is the quickest way to confirm what your body may already be telling you.
What to Do First
Schedule a prenatal appointment as soon as you get a positive test. At that first visit, your provider will draw blood for a panel of screening tests that check your blood type, iron levels, immunity to rubella, and screen for infections like hepatitis B, HIV, and syphilis. You’ll also have a urine test and a pelvic exam. Most providers perform a first-trimester ultrasound (often vaginal at this stage) to estimate your due date.
If you’re not already taking a prenatal vitamin, start one now. The most critical nutrient in early pregnancy is folic acid, which helps prevent neural tube defects in the baby’s brain and spine. The recommended intake during pregnancy is 600 mcg of dietary folate per day, and the U.S. Preventive Services Task Force recommends 400 to 800 mcg of folic acid from a supplement. Ideally, you’d start at least a month before conception, but beginning as soon as you know you’re pregnant still provides significant protection through the first two to three months, when the neural tube is forming.
Foods to Eat and Avoid
Pregnancy makes you roughly 10 times more likely to get a Listeria infection, a type of food poisoning that can cause serious complications. That single fact drives most of the dietary restrictions you’ll hear about.
Foods to steer clear of include:
- Deli meats and hot dogs unless heated until steaming, because they can harbor Listeria
- Raw or undercooked meat, poultry, and eggs, including runny eggs, homemade Caesar dressing, raw cookie dough, and homemade eggnog
- High-mercury fish like shark, swordfish, king mackerel, and tilefish
- Raw fish and shellfish, including sushi, sashimi, and ceviche
- Unpasteurized milk, juice, and soft cheeses such as queso fresco, brie, camembert, and blue cheese made from raw milk
- Raw sprouts like alfalfa and bean sprouts
- Premade deli salads (potato salad, chicken salad, egg salad) from a deli counter
- Refrigerated smoked seafood (labeled as lox, nova-style, or kippered) unless cooked into a dish
Wash all fruits and vegetables thoroughly before eating them, and don’t leave cut melon sitting out for more than two hours (one hour in hot weather). Even raw flour can carry bacteria, so resist tasting raw batter or dough.
Caffeine, Medications, and Everyday Chemicals
The widely accepted caffeine limit during pregnancy is 200 mg per day, roughly equivalent to two standard cups of coffee. Keep in mind that tea, soda, chocolate, and energy drinks also contribute to your daily total.
For common aches and pains, acetaminophen (Tylenol) is considered safe throughout pregnancy and is used by about 65% of pregnant women. For allergies, antihistamines like diphenhydramine (Benadryl), cetirizine (Zyrtec), and loratadine (Claritin) have not shown increased risk. Saline nasal sprays are a safe option for congestion. For heartburn, antacids containing calcium carbonate (like Tums) are a go-to choice, and acid reducers are also considered safe. Always check with your provider before starting anything new, but these are the options with the most reassuring safety data.
Around the house, a few precautions are worth knowing. Dry-cleaning chemicals can be toxic, so wash “dry-clean only” clothes with water when possible. Skin-lightening creams and some hair-straightening products may contain unlisted toxic chemicals. If your home was built before 1978, be aware that old paint and pipes can contain lead, which may be present in dust and dirt. Choose fresh or frozen foods over canned when you can, since some cans contain BPA. And buying organic produce is one way to reduce pesticide exposure, though thoroughly washing conventional produce helps too.
Exercise During Pregnancy
Physical activity during pregnancy is not just safe, it’s encouraged. The American College of Obstetricians and Gynecologists states clearly that in the absence of medical complications, pregnant women should continue or start safe physical activities. If you were active before pregnancy, you can generally keep doing what you were doing, including vigorous exercise.
Walking, swimming, stationary cycling, and prenatal yoga are popular choices. The key is staying hydrated, avoiding overheating, and listening to your body. Activities with a high fall risk (like skiing or horseback riding) or contact sports carry obvious concerns. As your center of gravity shifts later in pregnancy, balance-intensive activities become trickier. But the overall message from the medical community is that moving your body during pregnancy benefits both you and the baby.
How Much Weight to Expect
Recommended weight gain depends on your pre-pregnancy BMI. For a single baby, the guidelines break down like this:
- Underweight (BMI under 18.5): 28 to 40 pounds
- Normal weight (BMI 18.5 to 24.9): 25 to 35 pounds
- Overweight (BMI 25.0 to 29.9): 15 to 25 pounds
- Obese (BMI 30.0 to 39.9): 11 to 20 pounds
If you’re carrying twins, the targets jump considerably. A woman with a normal pre-pregnancy BMI carrying twins should expect to gain 37 to 54 pounds. Most weight gain happens in the second and third trimesters. First-trimester gain is minimal, often just a few pounds, and some women actually lose weight due to nausea.
Warning Signs That Need Immediate Attention
Most pregnancy symptoms are uncomfortable but harmless. A few, however, signal something that needs urgent care. Call your provider or go to the emergency room if you experience any of the following:
- Vaginal bleeding beyond light spotting, or fluid leaking from the vagina
- Severe belly pain that is sharp, stabbing, or cramp-like, especially if it starts suddenly or worsens
- A headache that won’t go away or feels like the worst you’ve ever had, particularly with blurred vision or dizziness
- Severe nausea and vomiting where you can’t keep liquids down for more than 8 hours or food down for more than 24 hours
- Extreme swelling of your hands or face, making it hard to bend your fingers or open your eyes fully
- Vision changes like flashes of light, blind spots, double vision, or sudden blurriness
- Fever of 100.4°F or higher
- Trouble breathing, chest pain, or a fast-pounding heartbeat
- Severe swelling, redness, or pain in one leg or arm, especially if the area is warm to the touch
- Your baby’s movements slowing or stopping (once you’re far enough along to feel them, typically after 20 weeks)
- Thoughts of harming yourself or your baby, or feelings of severe hopelessness
Sudden, overwhelming tiredness that feels different from normal pregnancy fatigue also warrants a call. Trust your instincts. These warning signs apply throughout pregnancy and in the weeks after delivery.