ITunes says my IPod is synced, but my new music doesn't show up on my IPod
I have a Ipod touch of the 5th generation, and I have music stored on my PC and in playlists in ITunes library on my PC. When I connect my IPod to my PC and sync it, ITunes says everything went just fine, but when I look on my IPod, the new playlists aren't there. I have my IPod for quite some time now, and my music has always synced. I manually installed the images for my music, since I digitalized cd's so they weren't there naturally, and those are suddenly gone as well. Since the images deleted themselves on my IPod ( but ITunes still shows them when I click on 'info' for each number), I can't seem to sync my music. When I discovered this problem, I have tried multiple suggestions, but nothing works. My IPod has the last update (iOS 9.2.1), I have enough storage, and I have clicked the 'sync my music button'. Can anyone help me?
iPod touch (5th generation), iOS 9.2.1