You're not alone. I also had burning pain in my breast bone for about a week, then it went away but instead I had pain under my collarbone on the right side, then it shifted to left side and also under the arm.
I also belch like crazy after eating or drinking just about anything.
I tried some samples of prevacid which stopped the burning in my throat and stomach but did NOTHING for those weird pains. I don't have health insurance so can't afford the drugs and don't want to get started on them anyway. I'm trying the natural stuff, and going to see if I have any luck with that. (licorice tablets and raw apple cidar vinegar).
I hope that we all find a solution to this madness soon!