I did this too...and eventually a bit more of "reality" started coming back to me. I've def changed because of DP and everything I have tried and coped with. It's a life-changing experience and I'm glad to say I have gone through the many storms and come out alright.
I'm starting to see improvements these last weeks. Everyday a little bit of "me" is coming back although I was always there to begin with.
I stopped OCD'ing over it. Soon my anxiety lessened, stress lessened, and I stoppeed giving a fuck about many things that I now consier trivial and a waste of time for me.
I've come to understand myself, my triggers, my weaknesses, and come to realize my mortality and that better or worse, I can't be sitting at home pondering existence -- I gotta live.
I wish you the best and if yuo need any tips and/or otc supplements/drugs that will help DP, let me know. I've tried a few things and have tons of other treatment "options".
Ha! I sound like a doctor but a little disclaimer, just in case, I'm not!
Anyway, take care.