Stress can delay your period. It's a vicious cycle. You stress and your period gets delayed and so you stress more. So that is a very likely possibility. Since you're worried you might want to take a pregnancy test. Ten bucks (or so) is worth it to put your mind at rest.
And FYI: What you described is not the right way to use a condom. Pulling out actually decreases the effectiveness of the condom. Correct use means that you continue with sex through ejaculation and then he pulls out holding the base of the condom so it doesn't slip.
(also double posting violates the guidelines that you agreed to by signing up. Just to keep in mind for next time)
I see you shiver with antici......pation
[This message has been edited by froggy_dear (edited 07-05-2004).]