A big part of the success of the surgery is based on your general physical condition and health, you are in good shape that increases greatly the probability of a completely succesful surgery. As the other feedback from @moonboy above mentioned, you know you have it and that is already an incredible blessing, you can do something before it becomes a more difficult and incredibly dangerous and painful event. I also found mine through an unrelated event (broke my leg biking) and it was 5.2, I had the surgery 2 months later as I was recoverying from leg surgery. For me the choice wasn't even close, I wanted it fixed as soon as possible. I and my family are so glad I did, it turned out to be larger that the original measurements, I live a completely normal life, maintain myself in good shape and get to enjoy my family. The pain of the surgery does not compare to a disection or rupture, as @moonboy described.

Again I wish you the best!!