I have never seen a beardie with ring worm before, but I HAVE seen it on horses and I agree this looks like ringworm. I think you should go to a different vet, get a skin scraping done and get this treated before this goes around your whole household. I remember when that horse at my barn had ring worm, he couldn't be ridden and we all had to wear rubber gloves to protect our skin when handling and treating him for fear of catching it ourselves or passing it on to our horses. It's something best caught and treated asap. I'm not trying to scare you but the chance of catching and spreading ringworm is an issue that you need to come at head on.