Having pain around back and front of rib cages. Feels like a knife twisting in there. Comes and goes without warning. Hurts when it strikes. sometimes difficult to breathe. Soreness in the area also...sudden movement sometimes starts it. A twist of the head started. It is intermittent . This has been going on for a week. I can walk my two miles in the morning and doesn t hurt. I am on Brilinta, and wonder if this could be causing it. I do have trouble with the breathing since being on this med. it bothers me ( the knife pain) when i try to relax th the muscles, lean forward can trigger it......have an appointment with family doctor on Tuesday