Make sure you finish the capsule until at least 14 days, or even better, take 10 days after all symptoms
gone (yes, the red rashes should
gone too later). I dont know why he prescribed betadine, I think maybe because a fungi is a "comfortable" host for another infection (such as positive/negative gram bacteria), so he prescribed you that to make sure your fungi won't be getting another infection.
If i was you, i would get a culture test.