Iud/pain and bleeding after sex

Jessica

I've gotten the iud beginning of November only had sex once right after.(and I'm 2 months pp)

Today we had sex for the second time, and I felt this pain that started right in the middle of sex, I ignored it because I thought it was just because I hadn't had sex in a long time. But now I still have the pain and I'm bleeding light pinkish blood. Does this have to do with my iud? Qhats happening? I never had this happen to me