Do you ever get random disassociative moments?

Like you’re doing something or you’re somewhere, and then you have a split second of feeling...it’s hard to explain. Like you have to re-evaluate your surroundings because you get...out there. A little like how meditation can make you forget where/who you are but only for a split second. But it’s not exactly like you forget who you are.
Lately my body has also been freaking out, struck by sudden needs to shake parts of my body violently at times. I don’t really know what’s up...so if anyone has any experience or clue, I’d like to know.
And of course my body shakes. I am trembling a little bit at all times. I don’t remember when that started cause it was long ago.