(((( Tree ))))
I can relate to that drifty feeling. It's scary to "go away" like that, not knowing what's going on around you or feeling able to control it. T told me before that it's because I haven't worked through whatever "it" is. I know that "it" is a lot of things, and it's all scary. Too scary. But dissociating without having any control over it is scary too. Blech. It's hard to be in that middle place. Very hard.
T has even mentioned to me that I dissociate in group, a little bit. I was surprised to hear that - like...

...He said that any time that I am not present, when I shut down, tune out, etc. is a form of dissociation. A milder form.
Strange how sometimes we can face difficult things head-on...and other times, our bodies just take over. It's scary.
I am glad that you're doing something to try to stay grounded.