can't afford medicine. home remedies for thrush??

We've been trying to get rid of my 4 month olds thrush for 2 weeks now. He's had 2 rounds of nyastin and it still hasn't cleared so his dr prescribed something stronger. For whatever reason, insurance won't cover it. This one is $50 😕 and after rent and car insurance I can't afford to get it. His dad won't be able to pay for it until Thursday. Idk what to do in the mean time. I don't want the thrush to get worse. Any home remedies??? We've literally been bleach sanitizing all of his toys and pacifiers. And his bottle are always washed after use. Is there anything else I can be doing to keep it from getting worse? He's insured through blue shield from my job.