skydrive in windows 8.1 stopped syncing

I just upgraded from windows 8 to windows 8.1 a few days ago, mainly because of the new Skydrive functionality. I then purchased a 100Gb plan and moved all my files from my PC to the Skydrive folder (56,564 files, 26.7 Gb). Skydrive started syncing without any trouble but then it stopped syncing. It just synced 36,073 files (15.7 Gb) and if I open my Skydrive app it tells me that it is "uploading 19,748 items", but it has been like that for the last 3 days. I have searched for a solution and nothing has worked. I even tried to refresh windows 8.1 but it told me that I can refresh because I am missing some media files (which files if I upgraded from the Windows store????). Because of this problem I have been very unproductive in my work since Monday (4 days) and I do not know what else to do. Please help me!!!