Mirena question please help me

Tiff
Hi all I'm new here I figured I'd try this app see if I could get some help and not feel so lonely lol . So I got the mirena in about 2 months ago and had my period from Sept 4 - 18 ,nothing since then beside occasional brownish spotting I guess. A few days ago I noticed only when I wipe there is a light pink tint on the tp. Is this normal with an iud? This is my first time with one. I'm kinda worrying myself if I could be pregnant again. I'm 22 and have three kids and got preggers with two of my babies on the pill so I'm panicked a little bit. Any help would be appreciated.