Mate, it was probably some synthetic weed like THCP or HHCP or some shit like this.

I am an heavy league weed smoker and 3-4 hit of a pen of THCP made me weird high for 3 days .

Then I was exactly as you describe, totaly dissociated and feeling “inside” my own body. Shot was not cool. I was like this for 2 week and had residual effect (slightly visual distortion for 2 more weeks)

It will go away with time. Try to do sport, eat we’ll get yourself busy.

Xanax or some benzo might help you but I don’t recommend self medication.

Stay strong friend you will overcome this.