Cumming in anal

So before yesterday morning me and my bf were on the couch so I was laying in front of him i sorta got frisky w him and I kept grinding on his Dick and so he put it inside my anal and so it wouldent really go in their so more like in my anal then it slips out and goes in the crack area, so he cummed and im sure it was inside my anal or maybe my butt but I got up and went to the bathroom to wipe it out. now im scared can the cum run down to my vagina? 😟 im kinda freaking out plus im on my period