usually the speed and the momentum of semen is reduced sperms are unsaleable to reach ovum and fertilize.so chance of conception are remote when sperms are exposed to the air./oxygen.
Hello,
To answer your first question; no, the sperm would not survive after being exposed to all of that activity...
Regarding your second question: no, she wouldn't become pregnant from old, dried out sperm left on your hand(s),hours after you ejaculated...
Unless your girlfriend already uses birth control, both of you should come up with a birth control plan very soon.
Take Care