Delayed menstration after losing virginity
I'm 17 and i lost my virginity on august 24. My last period lasted from the 9th to the 13th. Since i've lost my virginity I've had sex with my bf 6 times and i've used protection every time. he only came twice and when he did he still pulled out even though he had a condom on. I even saw the cum in the condom. Still, today is the 17th of september and at the moment i am 10 days late for my period. I took two pregnancy test on the 15th and they both came out negative. Is there a chance that my period is being delayed because I just lost my virginity? That is what my friends have been telling me so I am wondering if that is possible. Please help me!