You need to find a functional health practitioner, and be willing to try many different practitioners. It took us several tries to find a practitioner who was willing to test for mold. If you aren't familiar, functional practitioners focus on the root cause of medical issues rather than just symptoms. We found success with a functional nurse practitioner, though they capped out and we have moved on.
You may be able to find ways to get the tests directly (not through a health practitioner) if that ends up being the path you need. They are not cheap and not typically covered by insurance, but we found being mysteriously ill was way more expensive in the long run than paying for tests. May your path to healing be a straight one!
There are two tests we do periodically: https://realtimelab.com https://mosaicdx.com/test/mycotox-profile/
You may be able to find ways to get the tests directly (not through a health practitioner) if that ends up being the path you need. They are not cheap and not typically covered by insurance, but we found being mysteriously ill was way more expensive in the long run than paying for tests. May your path to healing be a straight one!