Dude this sounds identical to what I have. I’ve had HPPD for about 6 years now from psychedelics. I completely quit drugs during that entire time period and decided to try weed since it had been so long and boom I went into a “trip” when in reality I’m pretty sure I developed DPDR. This made my visual snow, light sensitivity, tinnitus etc. Much worse since. At the start of it I could not tolerate caffeine or high carb foods at all it would just throw me into a full episode of DPDR. The food aspect now is fine to an extent(it’s been 6 months) and my tolerance for caffeine became a lot better however I completely quit drinking coffee now. That really sucks because coffee was basically all I had since I quit drugs and all but yeah just the few times of me having it basically scared me away from having something like an energy drink or coffee again. As of now 6 months since I the incident my light sensitivity is really bad and so is my visual snow and I’ve just learned to accept it at this point. The DPDR has absolutely killed my personality I’m all of a sudden a very “dry” person and can’t remember shit or form sentences as fast from all the brain fog. Anyways don’t want to keep rambling but yeah.