Birth Control & Chances of getting pregnant questions?

Amanda
Hi! So i've been on birth control for five years. Most of the time I use condoms anyways to just be safe.
But Saturday I had sex without a condom with my boyfriend. We were intoxicated, and I took my pill at like 1:00 or 2:00am (i usually take it around 11:30pm). Does alcohol lower the level of effectiveness?
Am I most likely ok and not pregnant? Lol. 
I have not missed a pill in forever