What’s going on

Ended my period last week on Monday the 9th. Spotted light brown from the 9th to the 11th. Have had some cramping for the past week,today I did masturbate and then went to work. I felt like I had wetness in my pants so I went to the bathroom and wiped and saw pink on the toilet paper and looked at my underwear and saw pink on there as well. I have had the Mirena for 2 years, just want to know what’s going on.

P.s. I do have sex almost every day and I don’t use a condom, my boyfriend never cums in me.