I’ve stopped taking birth control on the 27th may, my periods became regular after two months (9th of every month). On the 21st September I took plan B and had another ‘period’ on the 27th. I had unprotected sex again on the 1st October and it was the last day of my bleeding, then had my period AGAIN on the 9th (that’s when I should get my normal period). On the last day of my period I’ve experienced pelvic pain and pink discharge. 3 days later I still have pelvic discomfort. What could it be?