I was on the Mirena IUD from May-June 2016, I removed the IUD and began taking bcp July 2016 in an attempt to regulate my period. My period came 8/19/16. I had unprotected sex the day before ovulation(9/3/16). My next period was due 9/16/2016. It didn't show up til 9/18/16 and lasted about a day and a half it was also lighter than normal. On Day one I used tampon and then I only needed the panty liner same as 9/19/2016, I only used a pantyliner and was very lightly spotting. My next period isn't due until 10/18/16, but I am cramping, having lower back pains, nausea, as well as lightheadedness and more migraines than usual, and smell sensitivity. Can anyone please give me some advice on this I'm going crazy trying to figure this out.