Where is it?

I am growing concerned, my period is here but not really. Now mind you I have an IUD in place. A cooper one not the hormone one. My period should have been in full effect already. Instead I am still wearing a liner just waiting to see if the slight staining I am having is going to turn into anything. I would so love to be pregnant again. It would be lovely to do this just once without drugs and doctors. I am also scared to death. I guess I need to POAS ASAP! I will update when I know something.