Bleeding during sex??

Bria • I'm a mom of two. Bi sexual. I'm an aspiring model singer and dancer.
So i was having sex with my boyfriend and after we were done i noticed i was bleeding but its 2 weeks till i start my monthly so i know thats not it plus it stopped spotting in a few hours. I do have an iud(paragaurd)... Could he have been fucking me too hard? Just curious...