That sucks man.. but i guess that is a fairly high dose of psiylo! 20mg! I am pretty sure that is 10 below an insane trip that Mkenna took in a flotation tank!!! Nice work..
But its a shame to here you have some sort of HPPD perhaps ? Only slightly different.. Im not exactly a believer in HPPD. I have mates that have sworn off acid after just READING about it.. apparently having a few lingering trails/ dots the next day means your going to get HPPD and they didnt want to risk it. I told them they were being silly. *rolls eyes*
But !
Its a shame you can't enjoy the herb man! Its a beautiful plant/drug/substance/whatever that i use on a daily basis and has provided me with alot of good memories and some bad , i.e waiting an hour + for a dealer

haha.. but some might not consider that bad.
I think it sucks that (some) people can't enjoy green. And i think it sucks even more when certain people tell other people how bad it is after they have an un-enjoyable experience. :-(
Similar to say if someone tried heroin or snorted an oxy with a mate, and spewed their guts up because it was their first time or because it was slightly to high-a-dose or whatever!
You wouldn't let someone write oxy's off and say it sonly for junky's just cause they spewed once right? You would tell them.. "hey bro, i think its just cause you had slightly to much"
I try and do the same for weed.. Example.
Saturday night, sad choice for this certain club these days, before we dump trips and went to a certain nightclub on darlingharbour.. near a certain giant cinema. I was confronted by a few people smoking cigerettes at my place out the back on the verahndah. I said "Man...ciggies...tsk tsk tsk" in a joking sorta way..but half serious. I was told "Dude..you smoke a fucking bong dude..100x worse!"
I just let it go because these certain 2 girls are rather ignorant to actual drug facts..but i told them its not actually worse in reality and that i have nearly zero lung damage over 4 years of fairly heavy smoking, confirmed with tests. They laughed and said "yeh right.." I told them about cannabinoid receptors and how the body is actually designed to intake THC etc.. they laughed.
Anyways...i kind of lost the plot a bit there towards the end but meh.