Period and Kyleena!

Okay. So.. I got my IUD on the 23rd of Jan. And was spotting for a week or so after.. then the red river started to flow. I had my damn period for 16 days. It ended a week ago. I thought that might be the end of it, by then today i started getting insane cramps again and bleeding. I’m not too sure what to do, or if this is normal. I did have sex with my boyfriend on V-day and yadayada he came in me. I’m not too sure what to do? The pain is really bad and nothing is helping. Has anyone else had this experience? Has anyone bled this long? I’m just tired of all of this.