The label really isn't helpful since there's such a wide range of "symptoms" people can have / develop; but really what DP/DR and what you're describing have in common is anxiety; and the "symptoms" you're describing could likely be attributed to the cyclical release of stress hormone in your body from being fearful of the symptoms. That's the panic cycle.
So... DP/DR? (shrugs) - couldn't tell you, but treatment is the same. Assuming you saw a doc who gave you a clean bill of health - I'd focus on Cognitive behavioral therapy to help you identify where your getting stuck in the panic cycle, (you could also just research it on your own and give it a shot) - and time. That's all you need.
The brain fog very common, and vision problems.
You have no need for memory if your body's panic response is triggered via stress hormone...
Your vision could do funny things because blood is pumping to vital organs and cutting flow to extremities in case you lose a limb...
And my guess is you're extra sensitive to things happening in your body... self checking etc... (me too) - but really that just continues the release of stress hormone when you get wigged out because you feel weird (because of the release of stress hormone.) It's just a shi**y cycle. You'll break it. Takes a special kind of faith that's not dissimilar from a personal Odyssey... sirens calling you to the rocks but you'll have to believe what you know and stay steadfast... I don't actually remember what happened in the Odyssey... maybe I should have used lord of the rings... but I'll spare you a bunch of analogies
You sound well, just a little concerned about some symptoms of anxiety.
Let me know if you have any more questions.
Cheers.