Hey- i recently thought a lot about this too ! Like, people say it is impossible to experience 'nothingness,' but we experienced it before we were concieved , surely we can not just have consciousness all of a sudden, it must either have developed in the womb (grew more and more ) or that whether we can remember it or not we have experienced nothingness. I have this slightly mad idea sometimes that consciousness is created through mother to child ! Although I have that thought on on and off days at a time.