I Have Many Stomach Symptoms, Cant Afford Endoscopy, Help!!!

Hello all, I am new to the forum. I have been looking over some posts and see that many others have the same problems I have. They are all similar so I have not been able to pinpoint what I have yet, and the gi ordered an endoscopy, but my insurance sucks and won't cover most of it.

For background, I am a 21 year old college student and I work at discount tire co. I just started having stomach issues last year in october. It started off only getting sick every couple of months or so. I would get severe nausea but could not throw up. Burping would make me feel better, but I could not seem to burp enough. It felt like if I could have one massive burp or bowel movement it would all go away, but it wasn't possible. Then if I did have a bowel movement, it still did not go away. I would be up all night because it felt so horrible I could not sleep. It would happen on friday or saturday for 2 to 3 weeks, then go away.

I recently had this happen about 1 month and a half ago, and have not been right since. I am constantly gassy, but cannot always release it. I have this pressure in my chest, sometimes it feels like there is a rock there. When I take deep breaths, the pressure gets worse. It feels like my chest is going to blow up. I almost constantly have the feeling you get right before hiccups, and if I yell or talk too much or laugh too loud I do get the hiccups (which usually last about 2 hours or more). I used to get a warm feeling in my chest (dont think it was acid, was on nexium, but it did not help that), and it would make it hard to sleep, but that seems to have gone away after cutting gluten. However, I am still feeling nauseous after eating sometimes and indigestion, with this pain in the middle of my chest. Occasionally I have horrible awful smelling gas, other times it is hard to even pass gas.

Has anyone else had these symptoms? The gi suggested an ultrascan since I cannot afford the endoscopy, would this be useful? I also do not have bowel movements often, I have had maybe 3 or 4 in the past 2 weeks. That is about normal. Does anyone have any ideas? I cannot spend much more money on doctors. I have been tested negative for h. Pylori, ttg antibodies, had x-rays on my stomach and chest, various blood tests, and have got nothing yet. Sorry for this being so long, but I wanted to try and give alot of detail so someone might know what I am talking about. Thank you in advance for any help.