I am so lost

Hello

Methane and hydrogen sibo. Also Marcons. Since January I have been having a throat tightening globus sensation that occurs. It is relieved by burping, almost like stuck burps. The burps get stuck and it's extremely uncomfortable, but also the muscles are tight. I already got an endoscopy and nothing remarkable to report. The thing I can't figure out is it'd make sense if it was caused by eating poorly, ie sugar and carbs. But it's breaking my brain because it's happening, sometimes worse, from things such as a can of tuna or a piece of lightly seasoned meat. Histamine? Burps? Please, I'm going crazy, I feel like I can't eat anything.

Edit: for any strangers reading this later... Everyone was wrong and idiotic. I ended up testing positive for marcons. No wonder the sibo doesn't heal.