Doesn't look like ringworm to me. We had a whole litter of pups with the stinkin things. Stupid vet at the time told me that I couldn't catch it.......... I did and it was 9 long months with two places on one are and 1 place on the other that left scars afterwards. Now I look like someone took a cigar and burned me on the arms!
I don't think you have that to worry about! (oh yeah, I changed vets!!!)