Period late 3 days

My cycles on average 34 days, its day 37 and no sign of aunt Flo at all. No cramps, no sore boobs, no headaches nothing. I have the copper IUD(had it for 9-10 months now) so I'm not sure if that delays or causes you to skip periods, but I'm trying not to stress out about it. I'm just getting curious. Has anyone's copper baby blocker delayed or made them skip a period???