So my period was due yesterday. I'm slightly irregular but generally between 30 and 34 days. Anyway, Hubby and I had sex this morning and half way through he noticed blood on him. It wasn't alot but enough to make me think period started. I wash up and put my cup in. That was at 9am. It's now 6:54pm and there was nothing but a tiny puddle of light brown (old blood, I'm assuming) We don't have any STDs. I've started my period while having sex before and it never stopped like that.

I was wondering if this happened to anyone else? Is it implantation bleeding or a fluke period start?