RE: Picking it back up...
I don't think it's stupid at all--we should all have a great deal of care and concern, and want to make that "perfect" shot. However, we are human and will make mistakes--just do the best you can to avoid them. Pick your bow up and practice, practice, practice. If you hunt from a blind, practice from a blind. If you hunt from a tree-stand, practice from a treestand. Use a 3-D target and don't worry about the scoring rings, shoot for a kill. Don't just look at where you want the arrow to enter, consider the angle and shoot for where you want it to exit.
You can't worry about what "might" happen--you might hit a deer in your vehicle, but you won't let that stop you from driving. Do the best you can and you can hunt with a clear concience.
Chad