I had a similar experience. What I think was a combination of cannabis and stress gave me intense DPDR that I'm still not over while I've had no real downsides to some pretty hefty LSD usage over the years. I think set and setting plays just as important a role in cannabis usage as it does in psychedelics. I doubt I will ever be normal again at this point, its been over five years including a lot of time where I lived at a Buddhist monastery trying to understand it.