"I don't know myself" is a common enough phrase I've heard and read. Another common one is:
"I don't know what I want (for my future/ work/ passion/ etc.)"
In my previous post, I talked at length about what could have caused this sense of loss of self. Through my work with my clients, and through some of their astutely pointed out comments about our work together, I've come to realize that there's actually another cause for this phenomenon, and it is possibly more common than some of the ones I've mentioned before.