Ugh, sorry about a chronic yeast infection. A short term one that goes away is bad enough. I found this article that really digs deep into the subject with some ideas. https://www.aafp.org/afp/2001/0215/p697.html First, I will just ask this which is do you have a regular partner that you have unprotected sex with? If so, treating them as well is important. Yeast can go back and forth. The article states that there can be underlying reasons why someone has a vaginal ph that makes yeast overgrowth happen so frequently. It's a big list and you should look through. Managing these gives you the best chance of being yeast free eventually. Ultimately, some women had to take long term anti fungal medication to break the pattern. If you don't trust your doctors, then a third opinion would make sense but it is hard sometimes just starting over. Going through it all again. If you like either you have seen, you could also be that squeaky wheel that keeps coming back for help. To not be ignored. What has been their suggestion to deal with this if they think it is colonizing yeast?
I'd get a complete work up of your hormones because if these are out of balance, it can affect things. Are you on birth control which can also affect things?