5days ago I had sex the condom broke an I took Plan B but I think I am spotting it's a brownish color my periods not for another 12 days am I spotting?

Yes. The brown discharge is almost certainly blood from spotting. Plan b contraception is a hormone and spotting is a known side effect. You should not be concerned unless the spotting becomes bleeding and then you need to call your physician. Anytime you are concerned you can call for professional help. The internet has several good sites that review the side effects - just search. Best wishes.
Probably. It's not unusual to spot after taking plan b. I would encourage you to take a pregnancy test when your period is due to be sure.