Weird discharge with an IUD

Jocelyn

Hey girls so this might be kinda gross I just wanted to warn you. I got my IUD (kyleena) in July. Ever since then I don’t really get a period but I do get this brown mucus discharge about once a month. It can be kinda thick at times. It also smells weird. Does anyone know what it is? I figured the brown color is old blood but my period has never smelled like this nor had this discharge. Help a girl out if you can. Thank you!