Why do I feel like I'm going to throw up?

Before, I never was nauseated and threw up only every 2-6 years. Luck me, back then. On November 11th 2011 I had the stomach flu for 3 days. I was a bit queezy after until November 28th. Then I got super nauseated. I stayed home for a week, thinking I was sick. I was dizzy, got this lump in my throat, flem, nauseated, and short of breath. Here's my average day ever since I started feeling sick:
8:00am- 9:00am- Wake up feeling nauseated , like my stomach is going to explode, and short of breath.
10:00am- I feel great.
11:00am-12:00pm- I get super nauseated and dizzy.
1:00pm-5:00pm- Feel better, but am a bit queezy.
6:00-7:00pm- get very nauseated.
8:00pm to the morning- super nauseated, wretching, cant breath, lump in my throat.
What is wrong with me? Doctors say nothing but I feel so bad all the time. How can I stop this?