So I am following the walk through and came to the point where you get epona, but I relized I don't have the song, is their anyway I can go back and get it, plz help
Simply go back to the Temple of Time and put the master sword back in it's pedestal. (You need have beaten the Forest Temple) Then go to Lon Lon Ranch and pull out your ocarina after to Malon for awhile.
Forget her for now or for good unless you want the fourth bottle. Get to a point when you can learn the song and when you go to race, rember at least 60 rupies.