IPhone :: Memos Deleted With 5.1.1 Update?

I recently updated my iPhone 4 to iOS 5.1.1. Instead of hooking it up to my iMac and updating it through iTunes,I just updated when my phone showed a notification in my System Prefrences app; hooking my phone up to a power source and connecting to Wi-Fi.When it was finished updating, everything seemed to have worked like a charm. That is until I checked my Memos. The 15 memos I had on my phone, all of which were rather important to me, were gone.I was pretty surprised and angry to see that the update deleted all of them. I don't remember this happening with previous updates.Did I not update my phone correctly and that's why they are gone? Is there any way at all to get my memos back?

Info:
iPhone 4, iOS 5.1.1, Update Issues