What could this be?

Sometimes when i eat I feel like vomiting during and right after I eat. Then all day I feel like vomiting. Then sometimes I feel fineWhat could this be?
If this continues I would go to the doctor and get yourself checked out. There could be a lot of reasons for this, since I do not know how old you are the reasons vary greatly. You could have a slight case of food poisoning, pregnant, diabetes, the list goes on.
you better go to the doctor you might have an eating disorder!
your haveing a reaction. maybe your lactose entollerant. I felt that way before I found out I was.
have a medical check up