After reading your post I felt like I was reliving a medical problem I had years ago. Here's my story.
I woke up one night with severe chest pains. Thought I was having a heart attack but no pain in my left arm and I'm way too young for that. (about 23 at that time) Saw a doctor the next day. Gave me lots of maybes and pushed me out the door. Pain returned again. Seemed to come and go whenever it pleased. This went on for months and all the doctor did was give me pain pills. (Hey, I was young and still thought doctors were Gods!) One night I woke up with such severe pain all I could do was cry. Called my doctor's emergency service and he called in a pain script for me.(I had foolishly run out and didn't refill soon enough) My husband picks it up. Next day the doctor calls me and tells me he's set up a GI series to see what's going on. (finally a test!) I drink the discusting Barium drink and they watch it go through me.
Turns out I had a gallstones and a bad gallbladder. I get this news while at the pharmacy filling my pain pills. Nice, ha? Doctor says he'll set up an appointment with a surgeon, my gallbladder has to come out. I'm furious and ask friends for names of surgeons. I get one and get in to see him right away. He looks at the GI report and tells me there is no doubt that it's my gallbladder and it must come out ASAP. I set a surgical date and in the hospital I go. My husband is in the waiting room when the surgeon comes out and says how sorry he is. Jim just about hits the floor, thinking I died. Doctor assures him I'm fine but he had NO idea my gallbladder was in such critical condition. It was enlarged to 3 times it's size and about to burst. All those months of pain and only getting pain pills was putting my life in serious jeopardy! I know you don't have insurance but if this could be your gallbladder, it's serious business.
Could it be anxiety? I doubt it although anxiety could be adding to your symptoms. Sounds like your heart has been pretty well tested and proven not to be the problem. Acid Reflux is possible. If you tried Zantac or Prilosec OTC, did you take it for at least 6 weeks? They aren't fast action meds. They reduce the reduction of acid in your stomach which should reduce acid reflux pain but they take time to do their job.
What worries me is the way you've described your symptoms. As strange as it sounds, they sound just like my gallbladder symptoms. Who knew you'd get chest pains from your gallbladder, considering where it is, but I sure did. I strongly urge you to see an internist and have the tests needed to check your gallbladder. If a hospital is Federally Funded in any way, they must take a certain number of patients for free. In your case, if this IS your gallbladder, it becomes life threatening (considering how long you've been having the pain) and no hospital can refuse you treatment. Don't worry about the money at this point. Your life is much more valuable! I'd like to hear how things turn out for you. I hope you post a message on this thread again.
I wish you well and I hope I'm wrong but be safe, not sorry, and see a doctor ASAP. Please.
~~IF WE CAN'T LAUGH, WE CAN'T SURVIVE~~