What do you do when the Dr. tells you some kind of really bad news about your body? You react in one way or another. Some might panic. Some might resign themselves to end of life issues. Some might go out and drink several "boiler makers" at a time or eat a double chocolate fudge sundae or smoke a pack of cigarettes in 15 minutes.
Me? I hold my wife's hand a bit more closely. I ask the Savior to consider allowing me a bit more time to tell the next generation about Him (Psalms 71:18).
And then I do some practical things. Like, reduce my to-do list goal from 6 daily goals to 2; lengthen my nap time by 2 hours; let the laundry pile up an extra day; that sort of thing.
You schedule the surgery time and date. You make sure your wife knows what to do if things don't turn out well.
Pray, give thanks for what God is doing to answer your request, and look expectantly by faith for God to reveal His next step.
That's what I do when the Dr. tells me that I have a 90% blockage in my carotid artery.