Re: itchy toes?
That's not fungal. That's almost certainly just chillblains. No idea why the doctor prescribed an antifungal.
Treatment is to keep your feet warm with nice wooly socks and sturdy boots. If they do get cold, re-warm them slowly and carefully.
It's usually harmless, although if you have serious circulatory issues sometimes they can break open and get infected.
Annoying, isn't it?