G.J.
I don't know if this is true for everyone - but Omigosh, I was Soooo tired! Although I think feelings of total exhaution was with my 3rd. I literally would put on a movie for the other 2 just so I could lay down on the couch. I do remember be so tired I could hardly move at times and I had normal pregnancies. If you are concerned, ask your Doc. maybe there is something you can change with your diet to get more energy.
otherwise, hang in there... just all part of being a mommy.