first time sex, missed period, peeing more often

My last period ended on the 16th september and I lost my virginity on the 17th but my boyfriend is very sensible wore a condom and checked after that it hadnt split, the sex also only lasted about 2 minutes as he rushed in too fast which cause me some pain. Since then we have only had sex on one other occassion more recently but again with protection. I was due to start my next period around the 14th of October so I am now about 10 days late and seem to be peeing more frequently. I wondered if anyone had any explanation for this as I can't see it being very likely that I could be pregnant due to the events above but at the same time I am still thinking the worst and worrying about it, thanks