Lately I have been sleeping a lot.. Like over 10 hours a night not including the naps I take during the day. No matter how much I do or don't sleep, I am very very exhausted. Lately I have been really dizzy, I could go from standing to walking and feel very light headed. I normally have headaches often anyways, but they are a little worse then normal. When I take a bath or shower and the warm water hits my stomach area I dry heave.. I dont know why.. When I eat anything I feel full after a few bite and then sick to my stomach. What could this be?!?!