Almost as if the separation happened but my consciousness failed to make the trip.
That's what it sounds like.
When I have things like that happen, I sometimes see 'etheric energy' leaving me (for lack of a better term). I suspect this is because there is something environmental going on (like cosmic rays or solar flares or something like that) because I don't have much of clairvoyant skills. When this happens, I'll usually project soon after (the next day or two days after). So if this is the case with you (did you feel almost 'too' energetic?) try again tonight, or tomorrow am & see what happens.
Something else that happens to me in this case is that I get bilocation episodes, and 'dreams in my bedroom'-type phenomena. Then I go back to 'normal' in a few days.