Hi want-to-heal...You have to remember that there are no clear-cut symtptoms for Candida. There can be very similar symptoms for hypothyroid, methylation issues or just parasites. Also, in my own experience, Candida never comes into the body alone -- there is usually always co-infection involvement from other different pathogen species like mycoplasma, bacteria viruses etc. This makes Candida very difficult to diagnose and treat. That's why doctors are so hopeless not only at treating candida but also diagnosing it.
I would up your LI dose to the recommended 50 mgs per day. Split the dose up and take it over 4 doses during the day. Lugols Iodine does a whole lot more than just help your thyroid. Read this.
I take high dose LI every day, been doing this for the last 9 years. I'm 66 y o and there's nothing wrong with me and that's not a fluke. I also take all the iodine companion nutrients every day and I always alkalize. But LI has always been my mainstay.