15 day period

Hello mommas. I'm nearly 2 months pp and I've been on my period since November 3rd. I got the IUD on Halloween at my 6 week pp checkup. Has anyone had this happen?? I'm tired of bleeding and I've never bled this long during my period before. I also have pelvic pain. My ob's office isn't open until Monday though so I can't call. Even then, appointments are so limited... Should I take a pregnancy test too? We've been sexually active since I was 5 weeks pp... Cross posted