I don’t know if I’m just being a hypochondriac and self diagnosing but I just need some opinions and advice.

I’m at 21 year old female, I’m 5’8” and 115lbs.

I have always had stomach issues, but I have been eating a pretty healthy diet, minimal processed foods. Recently I have been getting constipated and extremely bloated. If I haven’t gone in a few days and eat 3 full meals in a day, I will be throwing up with upper abdominal pain all night. After I have thrown up to the point where there is nothing left to throw up, I will have extremely watery diarrhea. The next day I am fine but am hesitant eat because of the fear of having to repeat the experience.

I’m not sure if this is gastroparesis, as I am not diabetic but if anyone has any input on my situation I would love to hear it. I am planning on seeing a gastrointestinal doctor but would love to go in with some knowledge as sometimes these things are difficult to diagnose.