the exact same thing happened to loca when she broke her toe. it took a really long time for it to heal. i had to be especially vigilant about covering her bandage with thick plastic every time we went out, not just when it was damp. after the bandage was removed, it eventually cleared up with the use of antibiotics but it took longer for her broken toe to fully heal than it did for her broken leg several years earlier.
good luck! you WILL get through this.