Weird bleeding

Casandra

I had my period on the first of this month. When I woke up this morning I wasn’t bleeding had no cramping nothing. About and hour later I started getting faint cramping and now I’m bleeding a heavy flow. My last period was normal not an issue. I’ve never gotten my period two weeks apart like this. I’ve had an iud for a y at now and it hasn’t given me any issues. It’s the only forum of bc me and my hubby use. Any ideas on what it could be?