Missed period, bled for a couple of days.

So, mid feb. My oil man came and and we... Ya knowed... No condom, no withdraw. I never had a period in feb, but I also started the nuvaring one week after he was home. Then, I took out the nuvaring on the third week on a Friday and I didn't start my period until Tuesday... And it stopped like mid way through Wednesday. Is it the birth control or should I take a PT.