Fifteen Weeks Pregnant

Like much of the second trimester, not much seems to be going on (although your baby would disagree). Many women find that the second trimester is a relief from the life-altering symptoms of the first and far away enough from the third to be too anxious about the big event.
Again, not much change is occurring in mom. While some women still experience nausea, headaches, fatigue, and other nasty symptoms, the majority of women will feel a burst of new energy never experienced during pregnancy.
As you continue to gain weight (some weight loss is possible depending on the individual), keep in mind that any gain or loss can be healthy and normal, as long your diet is controlled. Eating for two isn't always wise and giving in to your cravings may wreak havoc later (gestational diabetes). Make sure to eat a well-balanced diet with lots of calcium, fiber, folic acid, and essential nutrients readily available in most fruits and vegetables.
In addition to any other symptoms you may be feeling, continued warmth and bouts of lightheadedness are to be expected. During this time, your heart is pumping about 20 percent more blood than usual--blood that carries nourishment and oxygen to baby. By delivery, your heart will pump 50 percent more blood, just one more amazing feat of your body.