I am on sronyx and I have been since January. I have never missed a day and I always take it at the same time some times give or take and hour. On Friday night my boyfriend and I were having sex with out a condom on which we don't normally do... and he didn't pull out since he knows I am on birth control. I am nervous because we have never done that before and I am considering buying plan b. do you think I need to take plan b?

Of course you do know that pull out does not help a lot, and many ( including me) does not even view it as a real method, it only lowers sperm, does not stop them.

As you know, no form of birth control is 100 percent, so just just the pill does add to higher chances. A condom with the pill while still not 100 percent is better.
The only 100 percent method is no sex.

Of course you have almost waited too late, unless you are going now for the pill. The morning after pill is less and less effective the longer you wait till after sex. It has little effect after 72 hours. Which is Monday night, so if you wait till in the morning, while it may help, it will not be nearly as effective as it would have been Saturday morning.