Hello,
I'm sorry your having such trouble with the protozoans. The thing is that bearded dragons are good at not showing that they are sick. If yours was a rescue, there is a good chance that she might have parasites. A high level of protozoans, she could have been reinfected in her cage. My bearded had coccidia before which was a constant battle to keep it clean so wouldn't get reinfected. Have you thought about getting a second opinion?