Oh the joys of pregnancy!

I am just about to the uncomfortable stage of this pregnancy. And I'm only half way done! When I was pregnant with Levi, it was at this point that I started breaking out in hives while I sleep. It is really weird. I was hoping that I wouldn't have this same problem but it has started again. I remember when this first happened I woke up thinking I was being attacked by bed bugs b/c the welts on my legs and arms were so huge. I went to a dermatologist and pretty much the only thing I can do is take an allergy pill before I go to sleep. The hives really are uncomfortable and they itch like crazy. Why does your body have to do such weird things when you are pregnant?