Hi, I Get Nauseated When I Yawn, After I Eat,

Hi, i get nauseated when i yawn, after i eat, and when i awake in the morning. I also have muscle muscle fatigue and dizziness. After i eat I either stay full hours, like 6-8 hours, or 2-3 hours after i eat I'm starving. My dr. is starting to look at me like I'm crazy. What is wrong with me?!