Heavy bleeding with IUD...?

I had my daughter on Nov. 14th, on Jan 6th I had an IUD put in. I have never had heavy, long, painful periods before. About 2 weeks ago I started spotting, a day pad was all I needed for the flo. After about a week and a half the spotting stopped and it was HEAVY. I am going through super tampons every hour. If I leave it in 5 minutes to long I have a major mess. I know that heavy bleeding can be a side effect of an IUD. I also know that I may have to take it out if I continue to have this problem. My question is, How long should I give it, its been like 3 days of heavy bleeding? This is the only problem I have had so far with the IUD. I have loved it up until this point.