Last time i had my period was nov2nd. I had sex with my boyfriend Dec1 and thought i would get my period anytime soon but i know that sex changes your cycle so i didnt worry about it too much.  A few days after we had sex my vagina started to to itch and i started to have vaginal irritation and was painful when i peed, i didn't pay much attention to it because i thought it was normal and would go away eventually and it did. I had sex again with him Monday19th, keep in mind i still haven't gotten my period, well now my vagina itches again and now im having like a reddish discharge. Should i see a doctor?