During the first 3 months of pregnancy, or the first trimester, your body is undergoing many changes. As your body adjusts to the growing baby, you may have nausea, fatigue, backaches, mood swings, and stress. Just remember that these things are normal during pregnancy, as your body changes. Most of these discomforts will go away as your pregnancy progresses. And some women might not have any discomforts! If you have been pregnant before, you might feel differently with this pregnancy. Just as each woman is different, so is each pregnancy. And, as your body changes, you might need to make changes to your normal, everyday routine.