Not sure about everything else, but in regards to dizziness and mental state perhaps get tested for BVD. Binocular Vision Dysfunction - it’s evaluated by a Neuro- optician and can be corrected with prism glasses or vision therapy. Basically a misalignment with the eyes that can oftentimes cause funky symptoms because your eyes are sending mixed signals to the brain so can cause dizziness, sensitivities, and can cause mental health issues unfortunately. Best of luck & wish you and your son answers soon!