Bloody disaster

So my partner and I were just beginning having sex I was on top of him while he was laying on his back, what ever so yeah as we continued we went to go switch into a different position and I feel myself and it's was real wet, wetter than usual. But I didn't think anything of it, We were in the dark. so what ever he continues and then suddenly stops he  goes and turned the lights on and there was BLOOD everywhere 😭😭 His face was priceless