Hey.
First of all, personally I think that you haven't wasted a day—you've created a lovely pattern, and it just needs a little fixing up. 🙂
Your pattern tile is too wide, so the overlap isn't happening; this should be fairly easy to fix, though. Double-click the pattern in the Swatches panel, and you'll be taken into the Pattern editor. Using either the Pattern Tile tool (at the top of the Pattern Options dialog) or the width/height numeric fields, change you tile to get the overlap desired. It should only take five minutes or so to fix, then you'll be able to use your lovely artwork. 🙂
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