Buy a tube of Canestan but get the thrush variety as it has 2% clotrimazole rather than 1% in the athlete’s foot variety.
If you’re really badly infected, change socks every day, wash them hot, spray the insides of all your shoes with an athlete’s foot spray to kill the fungus and wash and dry your feet every day and apply the cream twice daily.
Dog saliva can infect your skin with ringworm. Then you’ll need to use a cream AND an oral drug.