Missed pill

Hey Everyone,

I usually overthink things like this but just thought I'd get another opinion to make sure I'm justified in it. So, I'm taking the Levlen ED contraceptive pills have done so for several months now. The other night I forgot to take my pill and then had sex with my boyfriend on the same night. We used a condom but im not too sure whether it came off at any stage, however, the next morning upon remembering I took the pill I'd forgotten to take.

Am I being a little paranoid? Or am I safe to rule out the prospect of pregnancy? I'm a student and it's around exam time so this would be one less thing to worry about...