> Doctors don’t really care to look at these kinds of issues

Perhaps for good reasons?

The science is messy, there are few proven interventions and every woowoo worrywart will be pestering their doctor. Your doctor is in an unenviable position.

With doctors in New Zealand, my one trick is to find good specialists and pay them privately.

I believe that a GP only helps point you in the right direction. Our public health system is mostly too overloaded to help (unless you have a critical problem and your GP helps you get in a queue).

Not sure what helps in other countries.

But I 100% agree that you need to take responsibility for healing yourself. Only you have the motivation, and the context and experience to judge your own problems -- however one needs to take care not to get caught in irrelevant or misleading deadends (especially when mislead by corporations or alternative woowoo freaks).