I had sex with a condom and the last time he pulled out the condom stayed in. The next day I took the plan B pill just to be sure. The day after that I got my period. But now I haven't had my period for a while, I'm wondering what is going on and what are the odds of me being pregnant?

I am an RN and my opinion is that the odds of u being pregnant are very slim. Especially since you started your period. Stress can cause you to miss your period, but STD's can also. If your periods were regular before and they do not go back to being regular after a couple of months, get checked anyway for pregnancy and/or STD's. But try not to worry so much about the pregnancy. The pill you took is very effective. The stress is probably your biggest factor.

Can you throw some numbers out there?

No, there are no "numbers" to throw out, first of course the plan B pill can have the effect to disrupt your peiord, plus the stress of all of this can also effect the timming of your period.

No method including plan B is 100 percent effective, since it appears he was not properly using the condom, it most likely had no effect, so failure of plan B perhaps 1 in 1,000 but it is a chance of failure

No, we can't throw numbers. There are too many variables to consider here.

Firstly, it is obvious that you and/or your partner did not use the condom correctly. Secondly, we don't know if you were ovulating. Third, you took Plan B, which will throw your period off.

Unfortunately you are now playing the waiting game.

For future reference, he, particularly, should hold the condom and grip with two fingers when pulling out.