My boyfriend has a really large penis (length & width) and I have an iud.. we've only had sex twice, 1st time: I bled but not very much, only during and a small amount afterwards and I was fine. 2nd time: I bled during and I'm still bleeding. It is around the time for my menstrual cycle to start but is it possible the he may have moved my iud & its stabbed me or something? I dont have any pain down there or anything but I was just worried?