Yes I'm extremely familiar with fungal infections in the ear. I hope the doctor didn't give you an antibiotic which is what some general positions do not knowing that it's a fungal infection as we know antibiotics just make yeast worse. Worst case scenario you can go to Dollar tree or get generic athlete's foot cream and you can use that in your ear if you find anything in liquid form that would probably be even better. If you find it cheap and there's a couple options grab them The active ingredient should end in ZOLE, SUCH AS miconazole, clotrimizole etc, or yeast infection cream, definitely put a lot in your ear with a q-tip and you're going to have to do it deep if you're not able to access a liquid that your doctor prescribed you. This is a common occurrence in the summertime particularly if you live in a humid climate, using q-tips after showers is an absolute must. I actually had to go into a ear nose and throat specialist doctor and they used a suction, vacuum of sorts obviously extremely tiny and they had to suck out the fungus that was in there. If you have any questions feel free to respond to this or private message me also it would be worth googling as well to see if there are other options out there but just remember you need antifungal ointment preferably prescription but if you can't get that then over the counter and I know Dollar tree has athletes foot cream, which as I mentioned is just another fungus what works for one will frequently work for another
Apologies I did this talk to text so don't mind the errors