When you're pregnant, your body is working hard. It has a lot more blood to pump, not to mention it has to grow an adorable baby. Because of this, your metabolism increases. This means extra snacks (yay), but also lots of sweat (boo). If you've noticed that all of a sudden you're waking up in a puddle, check when your last period was. This can be an early sign of pregnancy. For a little relief, try dressing in layers that are easy to remove throughout the day. And as if you didn't need another reason to stay hydrated, make sure to keep your cold water bottle nearby.