You may find that you're much hotter and sweating more than normal during pregnancy. This is because you're carrying more weight than usual and you have more blood pumping around your body.
If you're pregnant during the summer, this can be difficult to bear, so find ways to stay cool (see You are 31 Weeks and 6 Days). If you're pregnant in the winter, you may find yourself walking down the street in a light sweater while other people are all bundled up in coats and scarves. You might get into debates with your partner if he wants the heat on and you want the windows open!
Make sure you drink enough fluid throughout the day. You might find that the increased sweat causes a rash in the creases under your breasts or in your groin, so wash frequently and make sure that you dry these areas well.