I have a history of bruxism, anxiety and reflux.  7 years ago I developed chronic fatigue and tired heavy eyes.  All the usual stuff has been ruled out like sleep apnea, thyroid, testosterone, autoimmune, low vitamin D and B12.  I was having nasal swelling plus my sinusitis symptoms.  I have had allergy tests so I don't have any airborne allergies. I don't have any of the normal allergy symptoms either.  I had 2 nasal surgeries.  First balloon sinuplasty then 1.5 years later FESS.  Still same fatigue plus tired heavy eyes.  

At one point several months ago I tried Lexapro and Wellbutrin for 1-2 months but the increase in bruxism was too much.  I think I did notice a 10-20% improvement though overall.  So not even sure if I have depression.  I know I have anxiety though.  I have all the symptoms of low serotonin.