I feel your pain brother. I have been there before. The only thing i can say about that is a few years ago i was pretty much in the same scenario, wanting to shoot myself in the foot for wounding such a nice deer.
. Three weeks after my poor shooting episode my brother-in-law killed the buck i had previously shot with my bow.Had the scar high in his shoulder to prove it. He was chasing a doe, so i assume he was doing ok. The only thing you can do, is hope the deer servives, learn from this, and become a better hunter for it. Good luck and stay after it.