However since you have metallic taste in mouth there is a possibility of betadine toxicity, which usually happens on ingestion. “Should ingestion occur, symptoms of acute
poisoning are a disagreeable metallic taste, vomiting, abdominal pain and diarrhoea.” Refer: http://home.intekom.com/pharm/adcock/betadn-o.html
I am glad you are seeing your doctor today. Please do not ignore it at all as both infection and toxicity could be dangerous.
Let me know what your doctor says.