I'm working on a song and its going pretty well except for one thing.....The song is in the key of E magor so its already kind of tricky. I do ok until towards the end of the song when I have to use four fingers and the keys are far apart and it really strains my hand or I hit other keys I'm not suppose to. Does that mean I should just play the first three notes in the chords to relive the strain or will my hand eventually get use to it????

<Added>

Sry it's Believe from The Polar Express