Ejaculated all on my gf hand and she stuck her whole hand up her vagina essentially trying to force me to be a father! Is she pregnant?

Possibly. To get pregnant, your girlfriend would have needed to ovulate (release an egg) within the last 3-5 days. This happens about halfway between each period. It sounds like the two of you need to discuss future plans. If you two decide this is not the time for a baby, she can use emergency contraception/plan b up to 4 days from now. Plan b prevents pregnancy; it does not cause abortion if pregnant.