(((((iamspecial))))))))

As you know, nobody can diagnose you with an eating disorder (or anything else) here. But it sounds kinda troubling.

The situation with you being unable to keep food down - you went to the doctor, did they find any physical reason why you kept getting sick? Food poisoning, the flu, mono or anything else? Sometimes our minds can convince our bodies that we need to be sick, even if we aren't sick. Your mind can do a lot of things.

Do you think it's healthy to not eat for days at a time? Why don't you want to gain weight?

You can train your body to accept food, it just takes time - starting off with a small meal a day (breakfast is a good one) and doing that for a few days, adding a snack or another meal... continuing until you're at 2-3 meals and snacks per day. If you're worried about weight gain, not eating will actually force your body into starvation mode and you'll actually retain more weight. If you think you may want to lose weight, talk to your doctor or a dietician or nutritionist about healthy ways to do it. Crash dieting and restricting does havoc to your body.

(All of this being said from my own experiences and some books/articles I've read and not as a professional of course).

Do talk to a doctor and/or a therapist if it worries you this much.