Thanks!
I had testing done for SIBO last year but nothing recent. I will mention it to my doctor though. I think I found the source of my burning stomach - fluoride! I recently started a toothpaste with unknowingly high amounts of fluoride. It was Crest Pro Health and has like .454% which is outrageous. I have multiple chemical sensitivies from the mold so I think my body just couldn't handle the fluoride. I must have ingested some or some when down my throat while using it. I stopped using it about 5 days ago and stomach burning & chest pain is gone!!
Now I have to tackle all my other problems :)