i dry humped this guy a few days ago; he was wearing just underwear, and i nothing. pretty sure he didn't come, though; there were thrusts, but we only did this for at most a few minutes before going on to other things.

i know i was due for my period, and i started bleeding two days after this encounter. i got cramps as per usual and i know this is a bit eugh, but it's just as heavy as normal. i've always been regular; it feels like a normal period. would you say this is just normal menstrual bleeding, or do you think there is a chance of it being implantation bleeding?