sex & blood

Alyssa
I need help, I've tried searching but they all seem to be about post-pregnancy, so I'm 6w + 5d and last time my partner and I had sex there was a tiny bit of pinky blood on the tissue, I was worried at first but then that was it, should I expect this after every time? We've only had sex the once since we found out because my partner was so worried about it...