A buddy of mine pulled a broadhead and about two inches of arrow shaft out of the spine of a archery killed deer, a couple years back.
The deer had apparently picked up the arrow the year before, or earlier, as there was no sign that there was anything different about it, when it was harvested.
Not until the knife hit metal, anyway.
Don't wreck yourself over it. Learn from it!
I was firsthand witness to a CGN member whonking an arrow into the side of a buck's head. It had just come up out of the river valley, and was broadside to us at maybe 30 yards. It started out facing to our left. When he jumped the string, he swapped ends and his head was where his ribs were a part of a second before. He survived. But I cannot imagine the frustration that was felt, watching the buck bouncing away with the arrow sticking out behind his ear. Well, ya, I can, as I was there for that too.
The buck survived, the arrow was found later in the season, too.
BTDT. I spent the better part of a couple hunting days doing laps around an area where I had put an arrow into a doe outside Moose Jaw. Found a few drops of blood, and my arrow, but as far as I ever figured out, the doe got away and survived, as I never did find a carcass or remains.
The crows have found a deer for me in the past. Worth paying close attention to them. If there is much of a coyote population in the area, the carcass may not last the night. Coyotes gotta eat too!
Better luck (and careful planning) next time.
Cheers
Trev