Since updating to ios 7.1.2, phone won't sync with itunes
I'm using a macbook pro with mavericks as well as the latest version of itunes (11.2.2). I had some minor issues with my iphone 4s and was told by a guy at the apple store to update to ios 7.1.2 (from ios 7), and since this whenever I try to sync (via usb cable) it gets stuck at 'waiting for items to copy'/'waiting for changes to be applied'. Cancelling the sync causes itunes to freak out and I end up having to turn everything off and on again to no avail, with no new items being copied to my phone at all.
Is there anything I can do at all? Would it just be simpler for me to somehow undo the update to ios 7.1.2?