Period for 14+ days?!

Shali • Pansexual, 22 years old, she/her pronouns, college student
I just got the Merina IUD 2 weeks ago, got my period later that day, and have been bleeding for 14 days now. It's a log lighter than my 6 day very heavy usual period though, but should I be worried about it lasting so long and mybe longer? I see my OBGYN tomorrow but u wanted to see what people here said