Strange period

I was supposed to have my period in the next 5 days but it came today and is different from previous ones. It isn’t a lot and is brownish, also if I wipe there is not a lot of blood is almost like it is on its final days. I had sex earlier this month but the condom did not break, I was not on my ovulation days and he took it out before ejaculating also. I don’t think this is implantation bleeding but is not my normal period.

Ps. I don’t use another type of birth control