I didn't have lots of acid that I was aware of...it always accompanied gastritis, which definitely revved up my reflux. Reflux was the culprit, though.
It sounds like you might be having spasms. Do they start less painful, peak at some point, then subside for a bit?
It's tough waiting for appointments, isn't it?!! If the pain is that bad, by all means call your GP and get some help in the meantime. He/she might be able to provide you with some help.
Good luck! Wish I had more to offer!
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”