If you happen to have a muzzle that will fit her, put it on and take her to a new vet in the morning unless the bleeding is such that she needs to go to the emergency vet. If you take her to the ER Vet, you can get an E collar from them and put that on. It's just going to cost you big bucks. There is a chance they will let you simply buy an E collar without seeing her. I would call them if you do not own an e collar or a muzzle.
Putting tape and bandages and other things on the wound is only going to irritate the site even worse in her effort to remove the stuff.
Besides being something simple like hot spots and insect bites, there are other things it could be, all the way up to bone cancer so it should be checked again and given a 2nd opinion. You may need to take Xrays and have them read by a radiologist if everything else comes up negative.