im sorry but i dont agree with your interpitation of Derealization and Depersonalization. it is not a short period of time of loss of memory, or loss of attention. its a state of being of things in your surrounding area are like in a dream like state, it feels like your not really here, like your watching the world, but your not really here, and things just arent real.
a couple of years ago durring my whole situation with my health anxiety, phobias, my severe OCD, my fear of being in public, my anxiety, and panic attacks, i was in a hole and couldnt seem to get out.
my brother whom smokes marijuanna on a regular basis came over one night for a visit. i asked him if he had some on him, he said he did. i hate drugs, and never had and use for them asked him if we could smoke one, thinking it might relax me, and maybe make me feel better.....WELL. i got high and i tell ya i was SO paranoid, i was so scare i hated the feeling, i thought i was dying, i thought it was the end of the world for me.
from that moment on for the next LONG time (months) i felt like i wasnt really here, i felt like i was in a dream, things didnt seem real to me. i didnt want to tell my doctor, fear of him thinking i was druggie, or something to that effect. so after a wghile i started doing alot of reasearch on it, typeing in my symptoms into the net, and finding what i have had happen to me, happens, and has happened to alot of people.
i read that the EXACT same way that this happened to me, happens to alot of otheres the same way, and others with anxiety disorders like our also.
i had over come this, and was good for a long time, but it seems like when my anxiety gets so bad for a long duration of time, withought me getting any better, that i go through this alover again.