Hi vdgg
My name is Michel 34 from the Netherlands
First i hope you feel better soon. Yesterday i was thinking how well i was doing after all this Depersonalization $#%^ that controlled me for so long. And the fact people mostly are on these forums when they have a problem. Less when they have a solution. Also i realize this solution is one of 100 you can find online. This one worked for me. and might not for you or someone else. But might it be the SUN

Don't hate me yet.
It took 8 months before i finally had an appointment with a psychologist who told me that depersonalisation disorder is not a thing. And that stress is the cause. ###$. But on every topic like yours f.e. I read other people who have the same damn problems. So we know what it is.
Most people have a crappy time behind them. same here. crazy rollercoaster lives we live. We hide inside.
After a 2 year period of DPD i went on vacation. 2 weeks of sun. And o when you have dpd you do not want to go on freaking vacation. But the sun was there to. (We where not friends the sun and i ever) Since then i had 3 months of possitive DPD. Superhappy. And then again after while the bad DPD.
I found when it are 3 bad weather days. symptoms returned. But 1 day of sun and all is ok.
The vitamine D. No i am like border DPD. But the sun controlls it. Sorry if it sounds crazy stupid to anyone. Find your way. the land of not being connected to your body. Living in 3th person and everyone is a robot. It aint a nice one.
I was very inspired a while ago by a guy that wrote. It happened to me 3 times know. Once 6 months. then 3. and last time one month. In this time i learned to control my head. Now that it is gone. sometimes i call that surreal feeling and laugh to it. I am in control.
Later