Hot flashes are not uncommon during pregnancy. Just remember your hormones are in charge. Estrogen especially opens up your blood vessels. The blood flows through the skin and makes you feel like you are on fire. You feel very warm and uncomfortable. The best thing to do is find someplace cold, like a cool shower or bath. If it’s winter, you can step outside. Grab a cold wet towel and place it on your face or across your chest and abdomen. Ironically, once pregnancy is over, you will probably be far more sensitive to the cold then you will be to the heat.