Oh, I am so sorry about your hand! I hope it will get over this set-back soon and heal completely at one point! Did you ever see a specialist about it?
When I read that Davey was a boy, I immediately had to think about the fact that this dog will never have puppies which will prevent any further troubles in this regard.
I am sure that once Davey is truly integrated into the pack, you will start feeling more comfortable about dogs again. And if you take him with you on walks that might be added protection. I had always been afraid of dogs as a kid and this was one reason why we got a dog, my parents thought that this would teach me about learning to trust them. And then my host family in Denmark had a Rottweiler, who was actually a very sweet dog and loved to cuddle. That was a really good lesson for me as well!