Two good things to do NOW:
Get a tetanus shot.
Train your dog not to bite under any circumstances whatsoever.
My friend Leslie, who sweetly offered to watch my toy poodle while I was at Armadillocon, was bitten by the Little Darling while moving Cosette's food bowl. The finger became infected, and Les ended up in the hospital overnight on an antibiotic drip. As soon as my plane landed from Austin, I went to the hospital. Les was cheerful and bright-sidey ("It's been an interesting experience") but I felt -- still feel -- terrible. She is home now, recovered. I am looking into behavioral therapy for Cosette. This, it turns out, is very expensive.
A dog's mouth is a messy place. Well, just consider what they do with it! A tetanus shot is cheap. A hospital stay is costly. A friend willing to take canine combat wounds for you -- priceless.