I got ringworm on my chin once from kissing the head of my then-burmese, Louis. At the vets, he made not just Louis but
me stand under the ultra violet light so he could see mine too
anyhow got a cream from the doc and it disappeared within a week.
Think Ela's advice is, er, spot on. It's very contagious with touching, as kids would do. Hope you are ring free soon. Once my cat had it cured, it didn't come back so you should get rid of it from cats and kids.