Dunno about you guys, but I seem to have permanent CEV's. It was cool at first, but it makes falling asleep rather difficult. I wouldn't diagnose myself with HPPD because it only occurs occasionally when my eyes are closed.
Psychoactive substances in general have made you aware of those CEV`s. I know exactly whats going on with you as I had/have the same thing. They will intensify if you look at a light on the ceeling then close your eyes and you can watch the mark the light has made morph into colours and shapes and guide its morphing with your thoughts just like a psychedelic CEV.
You are just aware of something which has always been there now. Start meditating while going to sleep, if you can`t go to sleep it means your focusing on the sensory input from your eyes and noticing the jitter too much. You would not bother to do this before as it was always there and you would just lie in bed and dive in your thoughts and memories. After a psychedelic experience, seeing intense CEV`s it just makes you aware of this. Learn to control it, try and dive into memories like you once did and while doing so you will realise there is just blackness in your closed eyed vision like there once used to be. Trust me on that one!
And as for what your saying High|Hgih, 14 years of age is way too early for LSD, lol I would wonder what a 14 year old on LSD is like but more to the point, LSD didn`t cause you any permanent damage and no physical damage instead it distracted your young learning mind into the realm of the unreal, irrational and unexplainable. I don`t agree with the use of any psychoactive substances before the age of 18 for this reason. I think once the real world is built up in ones mind, then the unreal should be mixed in to get a positive combination for our life. In your case, I think its just a distraction and you can overcome it by pushing your mind in the right direction. You can control your thoughts and your biggest weapons are belief, confidence and meditation. If part of you thinks you have fried your brain then you aren`t confident to overcome it.
About a year ago, I thought heavy Cannabis use, a dose of lsd and 2 sessions of DMT made me less able to focus on the difficult science I want to do, less able to remember and focus on the real world and so on... I thought my CEV`s would just increase and increase the more psychoactive substances I used. I now realise that I`m just very aware to the flow of information. As for irrational thoughts I can`t explain, thats just the ability LSD has given my mind to go and think whatever it wants with NO LIMITS!! All of the things termed impossible in my life by people around me, those were like boundaries set up in my head. LSD has removed these boundaries, but once the boundaries are removed, YOU have to be in charge of your mind. Take control of that wild beast, its on steroids now!! This is like having a father supervising what a child does (father=the boundaries of sanity, child=your mind) once we leave our father, we are in charge of ourselves.
Once this beam of light is focused to daily tasks, you will notice how monstorously creative you are compared to other people...
I don`t know how to explain better but please don`t go getting all these crazy ideas, you are just AWARE now! Some fucking headtrip eh? lol