It took me years too. I have abused and had long binges with mdpv/apvp/aphp/mdphp/apihp and with freebase meth, few times with crystal meth too. But stimulants after all.
Yeah, i get auditory hallucinations too immediately after single dose of speed or other stim, within minutes. Maybe I got kind of allergic to stims and my mind cannot handle extra stimulation no more, and my body becomes very uncomfortable, nausea, achatisia/tics, headache, very hard to breathe, extreme stomach/lung tension, high BP and hr ovet 135 all the time, if I stand up I can faint. My body is telling me instantly that shit is not for me anymore, before I get to delirium/psychotic stage (in 2-6hours if consuming stims).
The worst part is, i somehow "enjoyed" those psychotic episodes with speed few years back, how irresponsible and stubborn I was.. Unconsciously I knew somehow, they are not gonna end well, but still cannot stop using.
Nowadays i'm starting to get to know how to manage to live somewhat normal life without constantly being scared and anxious because of hallucinations.
And the Funny thing is, i really enjoy shrooms/lsd/ketamine and for many years I've had only couple not so pleasant trips, tripping is nice and warm and wild, but it's not that dark, intimidating, scary and evil world what stimulantpsychosis is.
Sometimes lsd is too stimulating for me and I get anxious when coming up, but it passes in couple of hours.