i went to the gym two months ago and was working on an ab machine. i was trying to do 100 reps when i felt a sharp stabbing pain. kinda like a severe charlie horse. it was under my right breast in my rib cage area. this happened twice. i have not been to the gym since and last week i started have severe pain in the same area. it hurts when i move and especially when i touch it. what is this? i have taken motrin and tylenol but neither helps. what can i do? i may also need to let you know i have been diagnosed with fibromyalga.