Q: My I-Pod won't sync when connected to my computer.

Hello, mandrese.  

Thank you for visiting Apple Support Communities.  

I understand that you are experiencing an issue with syncing your iPod nano.  I would need a little more information about the behavior you are experiencing to provide a better answer.  Are you not seeing the iPod in iTunes?  What version of Windows and iTunes are you using?  Are you receiving a sync error?  In the interim, here are a couple resources that may help resolve the issue.  

Locate and view your connected device in iTunes

Sync your iPhone, iPad, and iPod with iTunes using USB

iPhone, iPad, or iPod not recognized in iTunes for Windows

Cheers 

Glad that this is all sorted and you are able to sync again.  It is really hard to say what could cause this, but sometimes a simple restart can resolve it.  

Enjoy your day!