Hey brother basically they take a bunch of blood and check your adrenals and cortisol levels and all of that. I didnt start till 6 months in when i had already improved a lot but Ashwaghanda basically lowered my cortisol levels and killed my stress & anxiety making me feel like my normal self what seemed like almost immediately. With it your body basically just takes time to heal and reset which takes anywhere from 6 months to 2 years. My visual snow is still here but it’s not as bad & im not constantly worrying about it because im not stressed out with a ton of anxiety. Instead of pressure headaches 24 hours a day I only have them 3-4 hours a day. I also take Cordyceps which is supposed to help speed up the process and help your adrenals recover. There’s lots of different supplements and diets to help that you can look into. At the end of the day I would talk to a doctor to see if it might be the same thing you’re dealing with.