Jenn - do you still have your gall bladder? sounds like the attacks I used to get prior to having mine removed. The sensation for me was like having a hot balloon inflated just below my sternum and the pain would radiate through to my back. The pressure was quite intense and I would have to lie back and sorta arch my back to get any relief. If it continues I would suggest a visit to the doctor for an ultrasound. Once they go bad they just have to be removed. Mine was filled to the max with hundreds of tiny gall stones.