D.E.
I had the same thing happen to me. I thought I was gonna lose so much blood I'd be a prune. Not to mention trying to keep the flood under control I ruined a lot of underwear etc...
After talking to my best friend (who has the copper iud) and the Dr. I found out it's totally normal. It takes 5-6 months for you body to regulate itself. But even then it will still be heavy. I couldn't hang personally and I had that copper one taken out for the plastic one. My periods were much shorter (3-4 days) and super light. If I would have known this before the copper one I would have never gotten it. I hope this helps. Good luck