On top of OSDD1-b, ofc. (it's listed as DID on the thing bc they didn't have OSDD :/)

I feel you...we were struggling with derealization just the other day....I did a bad coping skill to pull me out of it...but it's been worse since the new split happened...I'm sure if you ground yourself that should help with the derealization and psychosis...as for the pain maybe try a anti inflammatory...those tend to help us with our chronic pain....I hope this helps ^-^

Fellow OSDD-1b system also using DID as a placeholder

No we have DID. But I get the whole derealization that's hard