Do you usually get episodes of vomiting with rapid onset, persisting over a number of hours or days, and separated by symptom-free intervals, or you have everyday vomiting?
Do you get abdominal pain before experiencing vomiting, like first thing in the morning on waking?

Sounds like you've had a pretty rough time of it. I don't have an exact answer for you but here are some things I know. H pylori is the cause of stomach ulcers. I was on a treatment for that for a few months and that took care of the problem. But it seems that your ulcer has come back or has never gone away. Also, I found that my stomach is really sensitive to aspirin and ibuprofen; they both cause acid reflux for me. The real kicker was when I began throwing up suddenly with little or no warning. I had come off sodas and was drinking lots of juice. Turns out that my stomach can't take all the citric acid that's in juice. Most of the juice I was drinking was fruit punch that only contained about 10% real juice but that was still too much for my stomach to handle. If you take a lot of aspirin/ibuprofen or drink lots of juice you may want to eliminate those things and see what happens. I wish you the best of luck.

i, too, have been vomiting only in the mornings for about a year and a half now. I am a young female, 24, healthy and had to stop drinking completely b/c i would be guaranteed to puke all day long the next morning even after 2 beers.. I have seen 4 doctors in the US, half of them thought acid reflux, but the meds made my vomiting worse, and i was sick every morning guaranteed.
Since I can't afford a specialist, I can't get the tests i need. They also thought it may be stress, but why would I wake up throwing up after sleeping for 5-8hours? The only thing that helps me is kava stress relief tea from yogi, i think more b/c of the ginger root in it than the kava, but it has reduced my vomiting by a 1/3rd. I only throw up about 4-8 days a month now in the mornings, and usually only once or twice instead of all day, instead of not being able to even keep down water.
although my mysterious condition remains, a friend of mine had good health insurance and had a similar experience as i did. she is one year older than me, so same age also. She had a camera stuck down her stomach after like 6 hours after she ate a hard-boiled egg, and it turns out she wasn't digesting food. The treatment: Botox shots IN HER STOMACH! this made her loose a lot of weight (she was already really little) and it is very hard to absorb any nutrients... basically it paralyzed her stomach so the food passes through. This works for her though. The Dr. she saw said young women have been having very similar symptoms (that isn't morning sickness from being pregnant or acid reflux) and so it is now becomming more common among young women, why i'm not sure though.
Your case is very serious if it has happened every day for 15 years! maybe you should talk to a specialist about the possibility of botox shots, b/c my friend has stopped puking and now has her life back.
I hope you find your cure. Although I am managing my morning sickness more than you are, i also hope i can find a cure. It is hard to keep a job when you call out at least 2-3 times a month, they don't understand..
goodluck! hope that helps!

I'm only 13(female) and i've been throwing up every morning before school for a few weeks now. I had this problem for a while when i was twelve too. I'm trying to find what is causing this and i'm finding out a lot of people have this problem and get no answers. I'm starting to believe there is no answer.