iPhone calendar is deleting my events
The calendar on my iPhone 4s has been fine so far, then today I added an appointment, went back into calendar to check another date and noticed all previously entered appointments (even future ones) were gone. The one I entered today is still there as well as a random appointment from March 8th, but all others are missing. I had a bunch scheduled for today and they are all gone now. I have my phone set to sync all events and beyond that I don't do anything with the calendar as far as syncing, connecting, or anything else, besides adding new events. How can I get back my previous appointments (events) that are now missing?
iPhone 4S, iOS 5