I started to put the condom on, but I did it inside out and then reversed it, it was a spermicidal condom and my girlfriend was using a spermicidal film.we had sex and I pulled out even though the condom was on and everything and I caught it in time and ejaculated outside of her vagina. Is it possible for pregnancy to occur, and if so is it probable?

I don't think so... I'm no expert but hell I've been pregnant twice and I am obviously sexually active so I would like to think I knew a little something... but if both of you were using some type of contraceptive, and they were not damaged aaaaand you pulled out and ejaculated on her not in her I don't see how she would be pregnant, anything is possible though but I don't think it is probable

Any time you have sex, pregnancy is a possibility.

The probability is low in your case, but if you're not ready to be a parent, try not having sex.