I'm so sorry that your dog has spaying problems too. So has mine and it's terrible seeing your dog suffer.
I got my dog back from the vet with a collar and I haven't taken it off. It's of course not too comfortable for the dog (and Cookie knocks over anything on her way to her basket or when she goes for water), but it's so much better for the wound.
Hope things are better with your dog now. Give her lots of love and cuddles, it's what cures the best.