Allergies stem from adrenal dysfunction, so yes your adrenals are shot.
Trying to kill the Candida does not work. If the terrain is conducive to Candida growth the Candida will simply rebound. The trick to successfully treating Candida is to get the immune system back in charge and to create an inhospitable terrain for the Candida, which means an acidic environment in the areas the Candida normally resides.
Not sure why the Orchex is helping you to sleep. It is primarily bull testicle extract. It could be the calcium and magnesium in the product helping you to sleep.
Chronic fatigue is most often caused from adrenal dysfunction, but has many other causes as well.
Depression also has a long list of possible causes including deficiencies of any neurotransmitter, low thyroid or adrenals, low prostaglandins, high prolactin, etc.
Anxiety is most often caused from lactate buildup. Although it can also be caused from high epinephrine, low acetylcholine.
Brain fog is most commonly caused from thyroid dysfunction.
You are on the right track with the bitters and kefir. Although I would up the intake of kefir.
For the anxiety I recommend ashwagandha and nettle leaf, which both also support the adrenals and thyroid.
Schisandra berry and jiaogulan would also be good choices for the adrenal dysfunction.
And I highly recommend the TMG, which will help with neurotransmitter production and digestion.