Updated my iPhone 4 to iOS 6 and lost contacts and notes

So yesterday I find that my iPhone asks me to update to iOS 6 to which I say yes. Tells me if I want to do a backup to iCloud. I say yes again. It updates normally and at the end of the backup process it tells me iCloud does not have enough space for the backup. Oh ok, too bad. I'll do something about it later, now I need to use my iPhone. Turns out most of my phone contacts and my notes disappeared. So... hmmmmm... I didn't complete the backup to iCloud but it deleted my contacts and notes all the same. VERY DISAPPOINTED at Apple. Any suggestions?