I had my Mirena inserted February 2016 and for about a month I had bad bleeding and cramping. Around my 3 month mark my cramps totally disappeared and so did my period. I'm going on 7/8 months now and recently have been having problems with it. Sometimes I get the most dissabilating cramps, and I'll think that it's expelling, but I check my strings and it's just fine. Now after any type of sex (soft to really rough) I'm in pain and cramping afterwards. Is this something I need to go to my doctor for?