Diarrhea, Stomach Ache, Migraine, Nausea, No Appetite. Problem?

I have been a bit off for a few weeks. Initially after a night of lack of sleep, all due to a hospitalization of a relative I ate out, fast food, and got stomach cramps and diarrhea. That went away after a day. Post that, I received my first migraine, I'm 25 and that lasted about 2 days, it included nausea, vomiting and insomnia, sensitivity to light and a definite postdrome phase that lasted about 48 hours where I had difficulty focusing. 3 days after that I started suffering from dizzy spells. These have been going on for a week now, varying from day to day, sometimes they occur while reading, sometimes they don't. I suspected vision issues since I use glasses and perhaps my eye sight has worsened. Last night however I went back to my original problem, I was again staying in a hospital, this time due my mothers masectomy and vesicle surgery, and ended up eating out fast food, this caused gas issues (burping mostly), nausea, vomiting and loose bowel movements. Today I continue with the nausea, there is a feeling of fullness, I have no desire for food, but no stomach pain whatsoever.