Exhaustion and Sickness

Soooo for the past like 3-4 weeks, it doesnt seem like I can get enough sleep. I sleep and I sleep but I still wake up exhausted. I wake up feeling naseus (sp) and even somethings make me throw up. I dont get it. Now, if it was because of pregnancy, I wouldnt care! But its not. SO WHY! Why doI have to suffer and it not be for the reason i want it to be. I thought maybe this month would be different, but I have taken already 2 tests, and they are both negative. i am soon to reschedule an appt and i guess im going to go back on the pill for awhile...