Hey there.
People ask questions like this quite often, and the answer is a big yes and no. Yes, it is possible to get her pregnant, but no, it is not likely.
Because pre-cum can contain semen and you are getting it near the vagina, it makes pregnancy possible, but as long as its not near the inner parts of the vagina, it is very very very unlikely. Especially since she's on birth control.
But really, the point is nothings probably going to happen, but it's a good idea to keep yourselfs seperate without protection (even when she's on bc, especially if she doesn't take it at the exact same time every night).
But don't worry, your probably A-Ok.
Have fun and play safe!
~Sin
