WEIRD FEELING EVER

i never feel like this so long,its looks so weird .nothing happens to me but its like something was happen to me,almost everyday this shit happen to me.especially when i am alone feel sad without a reason like i am gonna leave everything what i have,i am gonna leave my mother,i am gonna leave my sister and i am gonna leave the people who i loved,this feeling it's so annoying especially when i am doing my job,cause i cant concentrated when this feeling comes i just wishing i am gonna be all right and this weird feeling gone.