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
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.