Ya I usually have 7 day periods and I did I see her on Friday
If you next expected period doesn't show, then I would maybe take a pregnancy test
Unless you have really short cycles, I wuold say it's too early to impantation bleeding - but it's still possile, I guess.
Any time you have mid-cycle bleeding, it's best to advise your doctor.
It was 5 days of brownish burnt red spotting a week and a half after my regular period....