TMI, sorry

Jocelyn • I am a vegan lesbian in rural New England pregnant with our first child. TTC'ed for 9 months
I inseminated last night and left the cup in overnight. Took it out this morning and it was all pink, like maybe some blood got in it. Anyone have this happen and know why? Felt the egg twinge around 1 am and this was my fourth time inseminating in five days.