My fiance and I have been together for three years and are both faithful. During the course of our sexual relationship, I have experienced pain (that I thought was an ovarian cyst or UTI, but was not) three times in the lower left abdomin. Doctors are puzzled. My guess is that the pain could be possibly related to my having IBS. The pain occurs only during straining (i.e. urination, bowel movements) and I have very little discomfort otherwise. I read that the intestines can become swollen and, as a result, become irritated during intercourse. Could this be a possibility? I seem to recall having had a sharp pain during intercourse. Could this have resulted in the, now three days, worth of discomfort I am experiencing?