so, it started with jaw and throat pain. I went in to see if I had strep...test came back negative, but the doc put me on antibiotics anyways. 2 days after taking the antibiotics, I had extreme chest pain under my right breast everytime I swallowed. It was so excrusiating, that I had an upper endoscopy done. The upper endoscopy showed mild gastritis and nothing else. I had a chest x-ray and that showed nothing. I started feeling a bit better with the help of omeprazole and thought I was getting better, until this morning, I woke up and the whole inside of my mouth is swollen, red, and very raw. Almost like I have a rash in my mouth. My tongue, cheeks, and lips...all inside my mouth...are messed up. I am worried all these silly symptoms are related and I have a major underlying problem that no doctor is catching. Any ideas?

Optional Information:
Female, Age: 27, Rhode Island

Already Tried:
Antibiotics, antacids, 3 doctors