IUD and wierdness

Okay so I've had the hormonal IUD kyleena for a little over a week, I got it towards the end of my period, and now I have a very gross looking dark brown to black discharge that sometimes has the pink or blood in it. It's very slimy... It doesn't smell weird or anything... But I've never had this before I got the IUD... I'm very nervous about it and it's truly stressing me out.... Has anyone else had this problem or know what's going on with my uterus/vagina? It's scary..