iphone 3GS recovery mode question?

so I updated my iphone to sync new songs and to update the software as itunes said it needed to be updated. after it completed, i thought my phone was good to go but eventually it said my phone was beginning the restoring process. I had not even selected this. I left it as it was and then it had the apple logo stuck on it. I tried pressing the lock button and home button to start up my phone but nothing. I plugged it into itunes and it now says it is in "recovery mode" and must be restored. Thing is, I do not want to erase absolutely everything. How can I get my phone to work again without restoring?!
 
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