my short story troubles

upon working  on my little story, i love working on it, but if i try to plan the whole thing out . it just don't work for me? if i make my self just sit down and type away the story leads in all sorts of directions and i really kinda like how its working out .but it seams to take me forever to hammer  more than a page or two at a time . and why  am i suddenly obsessed with this process and doing it . id rather do this than watch TV any day, makes me wonder where the hell this is coming from?