Sorry to hear that you are having to deal with this, Turin. What you do is to cooperate fully iwth the doctor, educate yourself by asking any qyestion that comes to mind and not being afaid to consult with the medical professionals about being afraid. This is a complicated but usually curable thing that would set anyone back. don't be afraid to admit it.
Get on the web and read. Get yourself set up for max comfort after the surgery, getting together a little support crew.
And keep us all posted.