I am scheduled for removal surgery tomarrow, last night up until now I have been in constant pain like a contraction. Doctor told me only to take tylenol (nothing else due to thinning of the blood before surgery) and if I start running a fever or feel ill too come in immediately. The pain is driving me crazy, its not intolerable but extremely annoying. No position is comfortable. This mass has not caused any pain until yesterday. Could it be because of the size (30cm, 12-15lbs) or something else. Pain can be compared to severe menstral cramping.