Hello amberjmca,
Thank you for using Apple Support Communities. It's my understanding the Sleep/ Wake button on your iPod nano isn't responding. I know the response of every button can be important for everyday use on an iPod. I am happy to help.
At this point it would be best to have your iPod examined. The following link provides information about service options and repair information for your area:
iPod Service Answer Center
Have a great day!