hmmmmm another one of those "take 2 aspirin and call me in the morning" diagnosis. Don't you just HATE THEM...I do.
I've never heard of shingles starting out as CHEST PAIN within the body....tingling, itching, burning ON the skin - yes.
E.T.A. IF YOU DO BREAK OUT IN A RASH GO RIGHT BACK TO THE E.R. AND GET MEDS...Don't waste time - getting medicine for shingles outbreak RIGHT AWAY in ***IMPORTANT***
Have you tried taking something for acid reflux - even if it's just a can of pop? to help make you belch.
Hope doctors are wrong on all ideas and it's something very simple and will go away on it's own. I too will watch for your updates.