Oh man, i'm sorry for the issues! I hope everything works out!
I can relate, i had a similar issue but my mouse did not chew my snake to bits.
Ok, as for the snake they are hardy species. In the wild you can see some with missing tails, HUGE missing pieces from their side, even a punture that has healed with the foreign object still there! We all learn by trial and error, it's the same with snakes. So, with proper treatment lets hope that this is one error your snake will quickly recover from.
Let us know how it goes!