I am 21 years old. My girlfriend and I were trying anal sex. We intended to rub against each other, to create the required lubricant. It seemed like a good idea, but now, I recall getting some of my pre-cum mixed in with her juices as we did, and I fear she may become pregnant. Also, I had gotten the mixture on my fingers, and even though it was dried, I am worried that later, when I fingered her, it might have added to the possibility of her becoming pregnant.