If you think the pain is beyond bearable, beyond the worst menstrual cramps imaginable, it could mean a need to visit
an ER. It is considered
an emergency if twisting is severe enough to cut off blood supply to the area, requiring emergency surgery.
Many times, the pain episode is a temporary one, not an emergency but definitely unpleasant. Do you know the size/type of the cyst and what the doctor has recommended be done about it?