Tell me I’m not the only one 😭

So last night I went to bed with my husband, had a cuddle and things started to get steamy, he rubbed his hand up and down my back then got to my bum and it was feeling great I was so relaxed, as I began to enjoy it more I just got this sudden cramp that only lasted for about 5 seconds then went thought nothing of it but when I got up this morning and went to the toilet there was red blood but only when I wiped there was nothing actually on my underwear, as the day has gone on it’s just got darker to the point it’s now just brown blood when I’m wiping.

Please tell me what on Earth happened I’ve told my husband he’s not allowed to touch me till I’ve found the reason behind this (I’m on the pill and don’t even get spotting) so I’m furious this has happened 😂