Is this depersonalization or something much more serious?

this is what happens, 99% when i stand up / walk around

1. Walk
2. As i stare at anything, my mind just blanks and i forget where i am
3. it gets even deeper, and i forget my surroundings
4. i go into a almost catatonic like state / like im not really "there".. mind is off somewhere
5. I snap out of it
6. I never stop what im doing whilst it happens (like a seizure), its like my body continues on automatic mode whilst my mind goes off
7. As i go back to normal, its almost like i never forgot anything, just that my mind got lost in "a really deep thought i wasnt having (on the outside, you wouldnt notice anythings happening to me.)

All this happens within 5-10 seconds

Ive tried watching the clock tick and after 10 seconds, it always happens. I cant remember the last time i could look at a clock in silence and after 20 seconds, still be watching it without any sort of "reverse dejavu feeling"

Doesn't sound like dp to me more like classical dissociation from trauma. Maybe ptsd maybe mpd, maybe bpd.

You need to see a shrink and get on meds.