Constant brain fog/numbness

I feel so foggy all the time and my mind is blank. My emotions are dull.
I've had DP since 4 years. Went to therapy and did blood tests (all came out fine).
I tried to ignore my symptoms..haven't been on the forum for a good while and kept busy...but I'm in the same mental state 24/7.
Other symptoms:

- weight loss (no desire to eat)

- memory

- comprehension

- mental fatigue
- not feeling anxious...just numbness

Please if anyone has any tips, I would appreciate it! What can I do except wait it out?