I'm currently on a birth control that allows for em to only have four menstrual cycles a year. Normailly I spot and have a regular period. However, this month my cycle all of a suddent became very heavy and very painful. Also, while I had a super tampon in a clear/pink fluid came out and went on my underwear and shorts. Not a lot of fluid but enough for me to notice my shorts were wet. What could this be? Could this be a miscarriage? Or a bad period?