I got my IUD about 5 months ago I was 18, I'm 19 now, after having it put in I didn't stop bleeding for almost a month. My periods would last for almost 2 weeks sometimes. They're not as bad anymore but I still have to use a tampon but I've always had kind of heavy periods. My stepmom got hers a month before me and she said her periods are really light and she just uses a liner. My period this month wasn't bad I thought it was done so my boyfriend and I had sex and I started bleeding really bad. It was dark red and kind of clumpy. Since we had sex I've had a really bad headache, pain in my lower back, pain in my lower stomach/bladder area (stabbing pain), felt like i'm going to throw up and dizziness. Should I be concerned? Would I know if the IUD moved?