You need to take a top-down approach. Have your GP rule out physical problems that can easily be identified objectively and cured before you delve into the subj

You need to take a top-down approach. Have your GP rule out physical problems that can easily be identified objectively and cured before you delve into the subjective realm of mental health where there are no cures. Rule out hypothyroidism, diabetes, chronic fatigue, brain tumors, heavy metals, etc. before you entertain the idea that you have mental health problems. If you determine that you have a clean bill of physical health, find a clinical trial in your area(clinicaltrials.gov) where they're treating depression with psychedelics and get your GP to diagnose you with whatever that study requires for admission.