Implantation bleeding.

Hi ladies I just need some "expert" opinions. So 3days ago I had sex there was a little blood put in a pad woke up no blood. Then yesterday same thing had sex there was a little blood put a pad on n there was only this brown discharge. My stomach has been a little crampy, but not period crampy.. so today the day my period is supposed to happen there is nothing. Just minor cramping making me run to the bathroom and check. Has this happened to anyone else..?

BTW happy New year ladies..!

Edit: I'm not trying to get pregnant. I have this app to track my period.

I would have been 12dpo when the spotting 1st happen.