Never ending period

So I got my paragard IUD on October 20 and my period came a but early the month of November. First I started spotting and then my regular period started it wasn't as bad as I thought it would be but of course worse than my usual with cramps and bleeding. It's been over a week my period is coming to an end but it still won't stop the blood is coming out slow almost nothing but i feel like it's taking long. Should I be concerned and call my doctor ? I really need some advice.