I actually do suffer from something similar and pysch said he suspected ptsd
I took some bad drugs when a kid, procyclodine SP* well they were my friends pill for his schizophrenia, I took some and it triggered a two day long artificial schizophrenic attack
I was seeing people chasing me with guns, terrified of life I jumped out of my second floor windows and feel through the conservatory. I got up ran to a strangers house banging on the door crying for help that I was being chased and was going to die.
I was taken away and locked up in a hospital, I escaped and something happened again similar and I nearly died.
No one was chasing me, there was no one there but because of what I took it was as real to me.
It still takes my breath away when I think of it and it terrifies me, if I was in a block of flats 50 floors up I'd have jumped out the window to escape and died
I'm not as bad as I was, this happened 17 years ago now.
I just laughed when they said ptsd, it did cause me serious problems for many years