Had unprotected sex 4 days before period took next choice. Now 1 day after expected date I'm having brown discharge. Is this normal? Will it come?

The brown discharge . Is likely old, deoxygenated blood that is coming from your uterus being cleaned out. Potential side effects w emergency contraception include menstrual flow changes (spotting, bleeding, early or late period). Take pregnancy test ; notify dr if your period is 7 or > days late.