For the past two years I've spent approximately 50-75% of my conscious existence feeling like I'm "floating" through my life. Not exactly like I'm an outsider looking in but like my body is autopiloting itself while my thoughts wander through a dulled ether. This is punctuated by moments where full awareness and corporeal existence inexplicably come rushing back and I feel like I just got "slammed" back into my body. Is this what dissociation is? Is this a commonly felt phenomenon?