I am 17. I've done acid 7 times, shrooms 3, and DMT once. My last psychedelic trip was early last July. Smoked weed almost every day for a while but stopped last November, been mostly sober since then not even much caffeine, but I did occasionally consume alcohol, didn't have any visual problems. But then a couple weeks ago I was at the dentist and after he took the light off me I had a sort of acid flashback, now I have been noticing mild tracers, mild visual snow, occasional flashes, and shaky/wavvy environment if I stare for a while. Doesn't seem to be a problem when on my phone or watching TV. Back in November I was prescribed Lexapro for anxiety but never ended up taking it because I learned to cope with panic attacks and anxiety. I have been reading a lot about HPPD recently, do you think what I am experiencing is a result of anxiety with over obsession and concern that's cause me to notice these things. It's been such a long time since I've been high or tripped I don't even quite remember what it feels like, so I have a hard time believing it's HPPD. From all the forums I've never heard an instance of symptoms popping up because a light induced them. What do you all think, am I just anxious? I stopped all caffeine and alcohol consumption, and like I said haven't smoked or done other drugs for many months.