about a week ago i had unprotected sex, on the 28th and the 30th, 2 days later on friday the 1st, i started getting brown discharge, it was alot and there were clots in it to, the discharge was medium/dark brown and looked a little yellow, it looked like after i end my period how i would get brown discharge, very strange and worries me, it lasted about 4 days, and then ended and i started getting my normal discharge, (clear, milky) what could this be? also my boyfriend and i use the pull out method (i know, not smart) but it always works for us and he's very good at it, what could this discharge that i had mean? im only 15, very worried...