Follow the instructions VERY CAREFULLY. There's a link to log in with your Adobe ID, and you have to refresh the downloads page or the download links WON'T work.
Hi Kathy. Did you uninstall CS5 befire installing CC? Photoshop always leaves previous versions when installing new ones, so unless you have specifically removed CS5, or are using a new computer, it sould still be there. If it is a new computer, then I suspect you know to deactivate CS5 on the old one before installing it to the new one. You can have two instance of both versions activated at the same time, so could theoretically have Photoshop on four different computers!