I need support

I am not asking for medical advice.

I fostered a kitten for a bit and then discovered they brought ringworm into the home. And gave it to my adult cats. And I just need someone to tell me it will all be okay.

It’s been two months of bleach mopping and laundry every other day. Literal thousands in medications, vet bills and cleaners. And I feel like we can’t win. Every time we get close it pops back up. I hate being at home, it worries me to pet my babies because what if I spread it. And I don’t know what to do anymore. I know bleach is bad for them and I had to throw all of their scratchers and toys away. I feel like an awful parent to them and I don’t know what to do anymore.