Birth control pregnancy?

Lala
I've been taking birth control (Aviane) for 4 months now and never had a problem forgetting to take the pill or anything. 
However, last Thursday I had unprotected sex and my boyfriend finished inside me. 
I came home and took my pill at the regular time but realized I forgot to take my last reminder pill yesterday and started a new pill pack that same day. 
My concerns are: 
Can I still get pregnant if I miss a reminder pill? 
Thank you