Well Tomorrow is my 1 year anniversary...
To change your profile/account....look up to the very top right near where it says, Welcome Lisa. Then there's a "my account" underlined. Press there. You may have to log in again. You'll be brought to a page with your pix on it (personal account center) and scroll down. In the middle column is a "I've got a date" area. Click there and you add your surgery date there. Save it and it should show up on posts from now on.
I think it will automatically add you to Dr A's patient page, if you've signed up on there before.
Paula