Can I be pregnant?

Aracely • Mommy of 1 waiting on BBy #2
Feb. 25 & 26 I had unprotected sex and my period was due on the 6th of March .. I was curre toy using the nuvaring but went back to get my refills on the rings and 
I told the nurse my period was late she said to insert the ring anyways and just wait a week for my period to come.. Been checking my cervix no signs of my period is there a chance I could b pregnant?