Copper IUD and still bleeding

Hi!

I got my IUD fitted two months ago at the end of my period. All went well and as expected I was spotting and cramping. My next period came bang on time 17th (which is normal for me).

But since I've started spotting again a week early. It feels like an actual period... It's been 7 days and it's still happening. I'm due on period on the 17th again but not sure if I will get a period. ... I'm really confused.

I had my month check in a few weeks ago (when I wasn't spotting) and everything was in place and as it should be.

Anybody else had similar experiences?