You were doing anal with your girlfriend and went into the other hole 2 inches for bout 1 second you dont know if there was precum and she is not on birth control can she be pregnant?

There is a possibility of pregnancy occurring as you also entered her vagina and there may of been pre-ejaculate present on your penis at the time. Pre-ejaculate contains sperm, but a lower amount than when you would orgasm and ejaculate.