I_Heart_Tito,
The same thing happened to Gucci. Actually that is the reason I found YT when I was looking info about ringworm. I took Gucci to the vet the first week I got Gucci. I have noticed a small bald spot on her back and the vet did the "blue" light but she wasnt sure, so she did a culture test. She told me to call back for the results. I did and I was told it was negative. Nobody contacted me to tell me that a couple of days after I had called the test turned out to be positive. I was so angry at this vet that I took Gucci to a new vet. The new vet is inside the ASPCA in NYC, I love it there. The new vet told me to get the records from the previous vet, and that is how we found out that the test was indeed positive, which we have already figured out it was cause Gucci had lost more hair.
The vet prescribed an antibiotic shampoo, a sulfur pet dip and Itraconazole. I also had to shave her so it wouldnt spread anymore.
Gucci was on treatment for almost 5 months.
Good luck with your baby. It takes time but it can get under control. And yes you need to bleach everything, cloths, floor, blankets, walls, etc.
Here is some info I found on
ringworm on dogs Home remedy for Ringworm
Attached you can see how much hair she lost and how she looks now.