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.
Dunno if it would count as depersonalisation or derealisation but I've had out of body experiences a couple of times when I've had too much. But I've also tripped when super high (too high).
I have a weird metabolism so my highs are really variable no matter how careful I am with amounts and method. Meaning I regularly end up orbiting the moon by accident. Have had some interesting trips.
I don't ever recommend being super sick, taking melatonin and weed. My dreams were really fucking weird and I slept like shit to boot lol.
I think I've become more practised at dealing with having to much as a result and my biggest takeaway is to surrender to the experience, remind yourself that it will wear off, and mindfully embrace the experience and how you're feeling, be really in the moment.
I'm a month late but to this post but I just wanted to say that this is what forced me to quit smoking. I had a couple of horrifying experiences and now I get panic attacks just being around people while they're smoking. I miss getting high as fuck and having a good time. It also sucks because it became legal in my state a few months after I quit.