Stuck for two days? I know I had 3.3GB of iMessages to sync so that took some time, even on my FIOS connection. I just left my device up and running for a few hours and finally it chewed through them all. If it took me a few hours for 3.3GB, I'm sure others with more could take significantly longer. Sorry not very helpful, but figured I'd chime in. I'd probably turn off iCloud and on real quick.