Eh. Until you have an albino you never realize how much they get bit-per a friend of mine. Even the times you think your snake didn't get bit while feeding live, it's quite possible it actually did. It was after I spoke with my friend and I saw his albino that I started paying attention and noticing the little marks/indents here and there on my own snakes after feeding.
The bite your snake received doesn't sound like anything to worry about. Even if it drew blood neosporin isn't necessarily a half to do thing. If you have a spotless tank/tub with clean newspaper/paper towels it will heal just fine. If it were a more major bite that took a chunk off, then I would put some neo on. I've never had a bite that bad, and only one bite that drew blood in the nearly three years I've been feeding live, and that was with a medium sized rat. Even though it drew blood it was pretty minor and was healed within two days.
IMO feeding live has its dangers sure, but a bite isn't going to kill your snake, nor is your snake going to be chewed to death if you supervise. Minor bites happen all the time, but the snake usually has the advantage of scales and being very flexible. Not to mention the rodent has a pretty hard time getting a good bite when it's being squeezed to death. Just my two cents on the matter.