Group situations – Stomach problems and vomiting

Hi all, I'm 24 and have Aspergers, and I've been wondering about something for a while.

When I'm out of my comfort zone (in group situations normally) my stomach often plays up and it means I can't eat anywhere near as much as normal. For example, it could take me an hour to eat one burger when feeling like this (whereas I'd devour it within 5 mins if not feeling out of my comfort zone). This can be embarassing when people see me not eating much and are probably wondering what's wrong.
On occasion, it's so bad that I eventually puke up after trying to fend off the sick feeling for ages, and I can't stop puking up until I'm laid down and in a relaxed position. Whilst in this stage I also can't get ANY food down without puking it straight back up. People who have witnessed this probably think I'm anorexic, but the thing is I don't do it on purpose and don't have these issues in my daily life at home, so it's not anorexia.
When my stomach plays up like this it makes me so tired, worn out and hot (even if the weather is cold). It's so sensitive that I don't even want anything touching or pressing into it, and I can't move about too fast. It just won't relax for hours, and the only thing that will calm it is laying down, which of course I can't exactly do in the daytime when with a group of people.
People don't seem to understand that it's not a choice, they just think I should be able to force myself to eat even when that's what causes me to feel sick.

Should I go to the doctors about this? It's a persistent problem that can create a real barrier to socialising and other things. Someone also said to me that it's very dangerous to puke up on an empty stomach.

Dear Dunno12345678910,

That sounds so distressing and concerning. I'm really sorry that burden has been placed upon you. You mention seeing a doctor and I think that is a really good idea. It is heartbreaking that this happens to you and a licensed physician might be able to help you. Wish I knew what else to say. My heart goes out to you!

Sincerely yours, Yao Wen

Going out of your comfort zone means your body is gonna respond as in any other dangerous situation. The respond to stress in these situations is fight or flight so, your body needs to be ready and in this being ready, feeding doesn’t fit with it.
So, what could be the solution? In my opinion the only way is to convert these moments you have to face to more frequently that are outside your comfort zone into habitual. It takes time, patience and the will to repeat them.
I have a nephew with Asperger’s syndrome and I’m myself social awkward. It’s not easy.
Are you attending to a psychiatrist or a therapist who can help you with anxiety and work on these social interactions?

I take pills for vomiting.. Dr may find out the problem. It's worth checking it out.