My girlfriend and I were being intimate and I did ejaculate and some of the sperm did get about 1 inch away from her vagina. She is on the birth control pill but we are still very scared of her being pregnant. Does anyone know how likely it is that she would get pregnant when I didn't penetrate and she is on birth control?

If the sperm was not rubbed or entered in, there is 0 chance of pregnancy.

If the sperm was not rubbed or entered in, there is 0 chance of pregnancy.
What are the chances if the sperm did get into her vagina? And remember that she is on birth control so does that make the chance non existent?

No birth control is 100 percent, so even on birth control pregnancy does happen.

I was not there, it either got rubbed in or it did not, only you know that.