A lot of what everyone wrote here makes sense to me. Especially what Ikk wrote. I've had a fear of vomiting ever since I was 13-14. I'm 30 now. When I was 12, I had to throw up a few times. Ever since, I've felt sick a lot, always fearing that I need to throw up. Which was a big problem in school or on the bus because you couldn't go out for a second. After a few different doctors, one sent me to a psychiatrist. I was very embarrassed about that, I was sure I had something physical wrong with me and they said it was mental. I've always seen myself as a sane down to earth person and I couldn't believe my mind was messing with me. I hated hypochondriacs and didn't want to be one.
I didn't realize that eating nothing would make me feel less nauseated, never occurred to me then. After a while it got better, I learned dealing with it myself by forcing me to do stuff I hated and I stopped seeing the psychiatrist. Years passed and thankfully I almost forgot about this. I've always kept the fear of vomiting though, I couldn't understand when someone would stick a finger down his/her throat when feeling sick. But next to that, I could do the normal stuff a teenager does like go to parties, drink alcohol (mind you, I'm not from the US, here underage drinking is tolerated), have fun with friends, whatever.
Then when I was about 24, I was at a time in my life when I partied pretty hard. I would work during the week and party Friday - Saturday and even Sunday. And those were the parties that started at 00:00 and ended at 10-11 am. I didn't drink any alcohol at those parties but I did smoke a lot, regular and joints. After a week of partying hard (5 parties in 8 days), I crashed. I felt very sick at the party and secluded myself from my friends. I ended up at a deserted buss stop feeling like I would puke my guts out. I didn't though, I've always been pretty good at stopping myself from puking. Not that that stops me from thinking I need to puke a lot of the time.
But anyway, after that very unfortunate night, I felt sick again. All the time. I stopped going out, stopped doing anything. I felt sick at home but when I went outside, it got worse. This constant feeling of nausea, of having to throw up. This was six years ago. Since then it has really crippled my life. It's gotten better after the first harsh period but it always stayed. I would also suffer a lot from acid reflux. Daily. I would wake up in the morning, drink some water and feel the acid coming up. After a few years of this and several visits to the clinic, someone prescribed me a proton inhibitor (Omeprazole) which did miracles for my acid reflux. I take two 20mg a day and I'm acid free. What a relief!
But still, the nausea and the anxiety are still here.
It's hard to wrap up years living with this in a few sentences. I could write a full book on my nausea, the other symptoms and the impact it has on my life. But something I said once to my then girlfriend is pretty accurate : If there would be the possibility of getting one wish granted, I wouldn't choose love, money, world peace, power or whatever normal someone would wish. I would choose to never EVER feel nauseated again. Pretty selfish I know but people here who have lived with this for years understand what I mean I think.
But what Ikk said is pretty accurate, I have a fear of losing control and an intense fear of vomiting in front of other people. Or even lose face in front of other people I guess.
Things I do or don't because of my "situation" :
- eat at someones else 's place : I force myself to do it, otherwise I would have no life. I don't tell 'm I feel sick but take some medicine to soothe my stomach. Even when going somewhere where I know I'm not expected to eat/drink, I don't eat beforehand so that the chance is smaller that I would feel sick.
- sit in the middle of a movie theater (yeah Ikk, I know exactly what you mean

) or anything else where I can't get away fast and unnoticed if I feel sick. Can you imagine the horror of vomiting in the middle of a movie theater? I guess most of you can...
- carry a folded up plastic bag with me in my back pocket. No one knows it's there but it's kind of my safety blanket. I don't think about it when I feel ok. But when I start to feel sick, it feels better to know that if I would have to throw up, I can do it "discretely" in the bag. I've never told anyone and it's very embarrassing but it helps me. It started when I was 14 and carried with me a paper puke bag that I took on an airplane. I didn't carry the bag with me for a lot of years but after my relapse when I was 24, I started to carry it with me again.
- don't eat before meetings at work
- avoid going to restaurants and if I have to, I try to get away as soon as I've finished eating. Sometimes I force myself to go to a restaurant because I can't have it control my life fully.
- carry some Maalox with me wherever I go. This soothes my stomach for some reason.
- don't go out and drink alcohol. If I drink about 3 beers, I can get very nauseated. I don't smoke joints anymore either. I get very very sick when I do it ever since that unfortunate night when I was 24.
- envy people who can drink and eat whatever they want without getting the nausea. Regular people never think about that, they can just do whatever they want, have fun and don't think about it. I think about it with everything I do. "What will I do if I get sick?" I just desperately want to be normal and don't feel sick.
- and lots more but this post is getting way too long as it is

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I still believe however that there is something wrong with my stomach. Not a regular illness but just a very weak stomach. And together with my fear of vomiting, this is a very bad combination.
Anyway, sorry for the extremely long post. Just wanted to share a part of my story.