whoa, i signed up to the website just because I came across this post via googling...."how can you tell youre getting better" but i was thinking more along the lines of a cough/cold.
BUT what you described is exactly how i felt....one day, out of no where, this happened to me. well i smoked a lot of weed & the night this happened to me i smoked what was allegedly a stronger strain. I was 'out of it' feeling crazzzzyyyy....a general sense of something being wrong etc. but it went away.
then i noticed the same symptoms when i was totally sober...not having smoked for weeks.
how I overcame the general sense of something being wrong. i do mental checks i say "Im just here at home, im safe, my mom & bro are safe....RELAX girl!"
i sort of taught myself to cope with the feelings...& i consciously try to make them go away with reassurance.
i dont wanna go back to my old self... depersonalization changed my outlook on life in a positive way...so i learn how to be a better me.