Could I be pregnant?

So I lost my virginity!! When my boyfriend first put it in he was raw I said no and he put on a condom after that we had sex six times between dec22-27 seven times with an condom after the last day I can on my period the next day!!!  My period was normal but it only lasted for 5 days but I had brown discharge the 6 day and it stopped!! My nipples have been hard and I threw up!! Could I be pregnant