Pregnant with IUD

Hi ladies.. so I’m really embarrassed to post something like this. I have a 5 month old daughter born first weekend in January. I got the Copper iud placed at my 6 week pp check up. I’ve gotten normal periods and sporting since then. Well this month I am supposed to get my period today actually and what looks to me is only implantation spotting that is happening. Has this happened to any other laides out there ? Did pregnancy make it full term? I am trying not to think too much about it cause maybe my period just really is being delayed but I can’t help it!