No period- first month with copper IUD

C 🖤

I got my IUD fitted just under a month ago and was due to come on last week. I'm now 4 days late and there is no sign of my period coming soon. I had some spotting about a week ago which lasted a day or two and I've had killer cramps for about a week. My check up is in two days so I haven't wanted to bother my doctor with it but is this about right?