I've been vomiting for the past 2 years with every single thing i eat and drink (even water). gone to many doctors. no one knows what's wrong with me.

Unfortunately: Neither do we. I'm sorry for the difficulty you are having . I suggest that you keep looking for a cause. Try yet another doctor. Sometimes it takes a fresh eye at a situation to get some answers. I would also like to suggest getting in touch with a counselor or therapist that can help you with coping strategies when dealing with a chronic illness, regardless of cause.