We’ve been doing iodine/epsom baths every night for a week now, wrapping in gauze and using a neoprene shoe every day, I do the soak and new wrapping at night so she stays dry all night, I picked the scab off the top around Wednesday, all the videos and stuff I find online it’s a clean clearly defined corn you can see to see what to go after, this is just a mess. I think I’m over my head.
If I were you, I'd either take her to a vet, or start her on a broad-spectrum antibiotic . It doesn't sound like the soaks are working too well, and I'm sure your back has to be about broken by now.
Do you have any antibiotics on hand from any past vet visits?