This is a long read but it might be useful to you.
So, ive basically recovered, albiet some residue dpdr feelings that only seem to resurface if im very anxious or depressed, usually at nighttime. Good news is, if you know how to work through it, itll go away faster each time.
I want to touch on the philosophical and existential aspect of dpdr. It was my main problem that caused me the most distress and concern when in the midst of everything. I know that most people on here are plagued by this as well. I read countless, probably hundreds of articles on meaning of life, why the universe exists, religious documents, why god would exist either, etc and asked everyone i know these questions till it was completely exhausted since there was no definitive answer. It only left me feeling life was meaningless and possibly some incomprehensible game/experiment which made life not feel concrete or real at all.
Guys, these questions are literally just a result from depression, wether it was there before or after the dpdr started. The dpdr can accually cause the depression because its so distressful and rips the emotional meaning out of your life by numbing your perspective, hense the existential questioning starts. Most of the time, these questions are only asked if someone is stressed or unsatisfied in life, like depression or if they get high on something like marijuana (cause it temporarily changes brain chemistry)
So basically, you are getting all these questions because the meaning in your life has been completely stripped away because of depression. I noticed this questioning went away if i forced myself to live life and distract myself by TRYING to be happy. When i succeeded, the questioning went away when i was truely enjoying something and that took a while and alot of persiverance to leave my comfort zone despite just how scary and daunting it was. It starts with a single moment of freedom of those thoughts and it slowly improves with time. To recover from this, you have to regain meaning in your life and that may include regaining emotions as well, as lot of us struggle with feeling any emotions at all. Do things that used to strike you with alot of emotion untill you finally feel it again. I started with sadness by watching sad things to make me cry and then worked on other emotions as i went.
Something a person in my life said kinda spoke to me. I asked her why we are even here and she simply replied "why not?"
The truth is guys, we exist because nothingness cannot exist without somethingness.
nothing can exist without its opposite and if you fear death like i do, ive come to a conclusion that you dont truely go away. I only fear death because i want to experiance as much as i can. And if your consciousness does end, you wont even be aware of it because think about it, you were dead for an infinite amount of time before you became alive and you werent aware of it either. Think of it like dreamless sleep. Its just complete peace which is the opposite of life. Life is suppose to be an adventure that IS stressful, wether its good stress or bad stress. Death is just peace. It could be a purely positive experiance, devoid of stress if you believe in religion which could be just as valid as thats also peaceful.
To recover from this, you just need to accept these things and start apprieciating that you are living, and for me, that was getting all the same stuff i had meaning for beforehand back plus some and getting out in public for fun activities can really help. The unreal feelings, perceptual change, memory fog and everything else will pass with this too. The reason theres no magic pill to save you from this is because its something you just have to change your additude toward.
Dpdr is just an extreme perceptual change to your reality, wether its to yourself, or everything around you or both (and i had both, even at the same time) its due to stress which changes brain chemistry. Even if it started out of the blue one day for you, take into account anything you were stressed about before that and wether you handle stress well, or wether you were simply bored with life. Boredom too can cause this.
If you have the desire to recover then that right there is something you have meaning for still, to live normally again. Just build on that.