Unable to isolate ringworm kitten--will my case of ringworm ever go away?

Cant say whether or not the cat is making it worse, but it sounds like it is a good possibility. What I can say is that the best way to treat ringworm is in fact a prescription, but if you cant see a doctor there is another cure- sunlight. If you go tanning and it is in fact ringworm, the UV rays should kill it right off. (might be hard to reach some areas however...) I'd recommend seeing a dermatologist if you can, but catch some sunlight if you can't. Good luck!