My period stopped after sex TMI

When I’m on my period I’m extremely horny, and we had just ran out of condom but the pull out method usually works for us, so we do the dirty and he pulls out (tmi, but it’s on the bed) so all is good, I go and pee because UTIs happen, and when I wiped there was only blood and no cum or anything, but next morning my periods gone. Has this happened to anyone else, and don’t get on to me about protection (we’re finally stable and stuff but we’re just not actively trying)