When I knew that I didn't write the diary I didn't angry or disappointed while I just feel it is a normal thing.
I didn't blame myself while just write it again from the beginning. It is a great thing for me. At least I can understand that everything will have some unexpected changes so you don't need to worry or anxious.
You will know whatever happened it still has many ways to solve it so don't limit yourself in an original place. Trying to see different aspects about the world and you will see many interesting things.
It is a nice day for me to accept some unexpected things.