Overthinking, but getting better

Do you overthink things? Are there things that frighten you that you can't admit what the main reason is? There are some things so deep within ourselves that we don't know the reasoning for the fear that grips us, though it is there... You could be out doing something, when the past sneaks up on you and you feel a sense of uneasiness. I felt that when I was out with librarian and her dog on a walk. This of course was a while ago, but still... it took me back to a time when I was younger walking my dog with a friend. I am still working on getting over that it all was okay, but things will grab you that you remember, and though something about the event has changed, something still takes you back nonetheless. It just makes you realize something you missed, or opens your eyes to see something that you were not ready to admit was there...