My boyfriend and I had sex last Wednesday, he used a condom then took it off and put his penis back in but he didn't put it all the way through to my vaginal canal. It only lasted a second. Am I pregnant?

Too soon to tell. Were you using another form of birth control?

Yes I'm on the birth control pill

But I only took it for four days on that day

But I only took it for four days on that day

Well you will have to wait. You haven't been on the Pill long enough for it to be effective.

Well you will have to wait. You haven't been on the Pill long enough for it to be effective.
So I'm most likely am pregnant?

There is always a chance if no protection is used, wait until your next period is due, if your period doesn't come, do a test

It's not most likely that you are pregnant, there is a chance you are. If you do not get your period, then you should take a pregnancy test.