PHR,
I believe you... and I've had similar reactions to meditation and things that are for whatever reason great for most people, but seem to have counter-reactions for me.
It sounds to me like it's more simple than you think, though. I think Alde (above) did a great job of explaining it. But... in short, you probably were in your own head as it was... and did some meditation and
wound up with a bit of depersonalization that stuck for a while. (As it can) Your brain is OK... it's just looping. I agree completely with Alde... get away from it. Refuse to entertain the topic the best you can.
Accept this is how you are right now... and take charge of your life the best you can. Oddly, being mindful can help us do this... but you'll have to do it using other methods. Simply refusing to entertain the thoughts is a form of
mindfulness. So, there's more than one way to re-write new neural pathways. But you're not going to get an "exact" explanation of how and why this happened down to the neuron... the brain does funky stuff when under
duress. (Panic, DP, obsessive thoughts, etc.) So, this is no different. You got yourself stuck, then fearfully reacted and made it worse. I'm just like you... way too analytical and want answers for everything.
But that's now how this will ease for you. You have to convince your mind it's OK being there... and then... it goes when its ready. Just accept you have some DP based on sensitization, stress, fear and was triggered by
meditating - but could have been triggered by other things too. I have had *exactly what you describe.
So, don't worry if people don't believe you. Meditation is sold as the solution to everyone's problems with no exceptions and that is simply not the case. But... you're not broken, and your brain will stop
going internal if you give it time and mostly... space to do so.
I'm having to do the same thing, and have had to before. It works... just try to be patient. PM me if you need to.
Take care.