Don't allow regret to rule your life, well what's left of it. Just spit the shattered canopy fragments out and 'keep calm' as they are fond of saying in popular culture. Sure the earth gets closer and closer with every thought but hey look at it this way at least you tried.Ignore those waves of pain.
Pain is a sign that weakness is leaving the body - so with that in mind (an it's all in the mind) you shouldn't worry so much. How long does it take to fall out of the sky? Really. Well you've got all your time to think about it.