discharge

I have a question ? I recently lost my V card in September & did it a few times after, however I missed my period in October I usually start the 20s but in September I got it 14s it is now November & I still have not got my period , i have missed before but now that I've had sex I'm nervous. but also every time we've had sex we've used condom & also made him get out before you know cumming .... what should I do ? Also I noticed pinkish/brown discharge for like two days it stopped & is now back to clear ???