Congrats on the recover! I had a similar experience last year with a doe. I shot her and she bolted with her tail tucked, I knew I hit her. I waited for an hour to give her time to die. Walked to where I had shot her and found no blood anywhere. I tracked a 50 yard radius of where I shot her and eventually found her 15 yards from where she was. I found no blood until I walked up on her. The bullet entered through the lungs and somehow ricocheted to the guts and the bullet was lodged in between her left hindquarter & the hide. Weirdest thing I've ever seen.