Don't know if this will make you feel any better, but I was started on Omeprazole a few months ago, and although it helped some things, it made the heartburn worse! Talked to the doc, switched to a different med, and things are fine. I had an endoscopy (which isn't bad at all) and was dx with chronic gastritis. There are so many parts that can get irritated in the GI system, and different meds work differently for different people.
1. Always be honest with your doctor, especially when it comes to taking/not taking the meds they prescribe. They can't help you if they don't know what's going on.
2. Step away from the computer!!! So many of us get a symptom and race to find out what it could possibly be, and usually get sucked into the parts of the website that describe the worst possible scenario. I have learned to only look things up after diagnosis (and even then, limit it) to get more information. Try to limit your internet searches. I know you want answers, now, but hang in there, try to distract yourself, and soon enough you will get some real answers!