Could I be pregnant?

So I had unprotected sex on Saturday, technically November 10th, but it was around 12:45 am so I guess it’s considered the 11th. Anyways we used the pull out method( I know, stupid), and he didn’t cum inside, that we know of, but I’m still worried. I plan on getting Plan B tomorrow. My period just ended Friday the 9th, and my fertility gap doesn’t start for another 3 days. I feel like I may just be paranoid, but I need some confirmation! Help!