You should call your doctor and describe what you have describred here. Ask if you can get a script for an upper GI at a local, closer hospital. Something is going on after all this time that indicates a problem. Probably going on soft foods and mushies for awhile until you get answers might help. But it is nothing to fool around with. Pain is an indication that something is wrong. You need to get it investigated or it's likely to happen again. If it happens again, go to the ER. Slippage and erosion don't always produce symptoms. Good luck.