not eating after being sick?

alright so about a week ago I had a stomach virus that had me projectile vomiting and completely lost control of my motor functions for like 3 days. after getting better, I noticed I cannot keep any food or drink down for more than 5 minutes. I eat or drink something and about 50% of the time i vomit before I even swallow. I havent been able to keep anything in my stomach since like last friday. My doctor said I am fine and just gave me medicine that is supposed to keep me from vomiting but that didnt work either. any ideas what could be wrong? I have also had diarrhea since about 2 days before everything started and when I vomit, my legs go completely numb and I fall down and am burning up for at least 10 minutes sweating. Help would be greatly appreciated