I haven't had that exact feeling, but I have wondered why is it that "I" am the one inhabiting this body seeing out the eyes, thinking these thoughts? There are billions of other people and I am not any of them. I have a brother and sister I didn't end up as them. Its all too odd and I think it is a trap to think about because there is no answer. Spirituality tries to answer some of these questions, but not conclusively. I think it is a calling from your soul to set you on a new journey toward seeking Truth, because underneath everything there is an unchanging truth. Now I see just how amazing life is, how many steps it has taken just to get to me and here I am. First there had to even be a universe, a planet viable for life, life to happen, then to get to me it all seems pretty amazing and that maybe there is some sort of design? I do not know, just use these thoughts as motivation toward optimism not pessimism. Hope that I was some help for such a huge question.