Best suggestion I've got:
Re-introduce yourself as you would to a Dog you've never seen before and that isn't sure it trusts you.Go outside, sit down, and give her a chance to come to you, with lots of space to retreat so she doesn't feel threatened. When she eventually does so, don't grab at her; make clear that you're happy to see her, possibly offer her a treat or two. Let her convince herself that you didn't mean to hurt her and she's still "your baby".
Then see if she can be persuaded to follow you back inside.
If she's willing to accept you as Mommy again, it'll be a lot easier to examine the wound, clean it, and if it's at all serious take her to the vet.