strange discharge after IUD

Hey guys!! I'm sure you're all tired of me and my mirena questions, I'm just paranoid. So sorry!! Anywho, I got my mirena two days ago and have noticed today that I've got some strange discharge. TMI; It's kind of yellowish sometimes, other times kind of brown. But there have been weird, mucusy pieces in it that are kinda grey in color, and smell sort of metallic. Is this normal? I know that change in discharge is normal but I don't know if this is. Help!