So, im 16 and have had my period before. On like the last day or the day right after i was done with my period my boyfriend and i had quick sex with no condom, but he pulled out before he was even close to cumming, and i dont believe he even precummed. That was around 3 weeks ago. And i had no problems. Then, last friday night we had sex with a condom and it was fine, but since then i have been having weird itches/pains down there and this brownish substance on my underwear that sometimes has slight bits of red. Ive been drinking water and cranberry juice and sleeping without underwear on , because i thought it could be a UTI and ive been doing that about a little less than a week but im not seeing results? Could i be pregnant? Some other disease or condition? Im freaking out. I need help and i dont want to ask my mom yet