Yeah, it almost stopped me smoking some years ago. It is scary experience on it's own, even more when stoned. It was hard time in my life though, full of anxiety which caused derealization even when I was sober. When things straightened up, also derealization went away.
Sorry to hear you went through it too! It certainly was very scary for me. I thought I was going to die, though I was oddly content about it happening. On reflection, that's quite good to know, but still didn't stop it from being a scary experience at the time!
As I learned the best way to deal with this was just ignoring it. First few times it got me though, but when it turned out I didn't die after all, I said fuck it and just enjoyed my time.
Nice one, super stoked you got through it! Ignoring it shall be my tactic. I've briefed my girlfriend on it and she was amazing getting me through it last time.
You're right, having all 3 at once certainly didn't happen!