Took plan b on the 30th (12 hours after intercourse) had bleeding on the 6-11th assumed it was period- now i have brown discharge. is this normal?

Yes: Brown discharge is difficult to determine in terms of age. This brown discharge could have been from your bleed on the 6th - 11th. Nothing harming. Sounds to me like you are likely on the 9th day of your cycle. Definitely in the fertility period, so if you don't want to be pregnant, now would not be a good time to have unprotected intercourse. :-).