Calendar empty after updating to iOS 5
I downloaded and updated to iOS 5 on my iPhone yesterday. I thought everything was correctly restored, untill I discovered that my calendar was totally empty. The subscribed calendars were in my calendar list but their appointments were gone. Also my manually added appointments were gone. I don't have them saved somewhere else because my iPhone calendar is my main (and only) calendar. Is there a way to get these appointments back?
iPhone 4, iOS 5