After i finished my period i've been experiencing a strong itch and pink/brown discharge. i'm a virgin but week prior my bfs genitals touched mine.

Vaginal discharge: White itchy discharge can be a sign of a yeast infection - yeast infections are primarily associated with itchiness and can have some small amount of burning with urination. They often occur following the menstrual cycle. If you have not had penetrative sex, it is unlikely you have any STDs. There is a rare chance of acquiring an STD through oral sex, but less likely.