Implantation bleeding or menstrual cycle?

I am going with menstrual cycle but I would like others' opinions. Had sex in Aug. unprotected. No ejaculation. Condom was repeatedly taken on/off (retarded, eh) Had sex 5 days before what was suppose to be my period.. Ended up 10 days late. Now have new cycle, I guess (at beginning of month now) 2nd... show more I am going with menstrual cycle but I would like others' opinions.

Had sex in Aug. unprotected.
No ejaculation.
Condom was repeatedly taken on/off (retarded, eh)
Had sex 5 days before what was suppose to be my period..
Ended up 10 days late.
Now have new cycle, I guess (at beginning of month now)
2nd time having a period.
Usual PMS symptoms, heavy bleeding, usual 4 day length.
Started on the 7th last month and this month.

Wait.. I think I am making myself look like an idiot. Sounds very menstrual
like to me. Do you people agree?

Also, when spotting.. how often do you spot, how long does it last, and how light/heavy can the bleeding be? Just curious.

Thanks.
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