Birth control

So I got an IUD put in on the 8th of this month and I spotted for a few days. It then on last week Sunday I started bleeding heavily but wasn’t due for my period for 2 weeks. It’s pretty heavy. I was told that once I got the IUD it would make my periods stop or lighten up. But it didn’t. Did anyone get the IUD and this happen to them? Did it make your periods stop or lighten up any after a while? And did you get your period right after you got it?