I'm not sure what your burning feeling is but it could be acid reflux. I had acid reflux before my banding and they fixed my hiatal hernia and so far, I no longer have it. I had it for years. I would also suggest chewable tums - which is almost all calcium. When I saw doctors in the past for my reflux, they tell you that drinking milk will make it worse. It will feel good immediately but make more stomach acid and make the problem worse. Also, they tell you to avoid eating mints for the same reason. The tums should work.
I was banded 5 days ago. I also had a lot of gas in my chest. I would usually take two or four gas X strips and tap on my chest for a little while and it would come up. It helped come up if I walked around a bit too. Good luck!