Weird dizziness, headache, fatigue, over sleeping

I have been way way! over sleeping, like 10 hours or more a night, not including naps on a regular bases. No matter how much sleep I can get I still feel exhausted!!. I can go from standing to walking and get very light headed and dizzy. I normally have frequent headaches, but lately they have been more and worse. When eating I can take a few bites and feel full and then sick after. When I take a bath or a shower and warm water hits my stomach area I get the feeling a vomiting, and then I dry heave a little. I have also been getting weird Hot and cold sensations. I feel as if I have so many problems and that I'm broken..