how to restore the items lost before i backed up my ipod

Well I traded in my IPod after I cracked but before I did I backed it up so all of my items wouldn't be gone. I could not restore my new IPod right away so I waited a week. In that week I accumulated a lot of pictures and notes. Yesterday I decided to finally restore my IPod. When I did I found that all of the pictures and notes I had saved in that week when I had just gotten my IPod had been deleted and replace with all of my old data. I was wondering if there was anyway to restore those pictures I had saved during that short period of time. Thank you and have a wonderful day 🙂