think Celia makes a good point, a lot of people have a few anxieties about surgery in general, mostly about being under the anaesthetic, etc, coming clear to yourself about what really is causing the anxiety could help clear that fog, unless you are just a worrier type person who easily gets anxiety over things which would make sense you would be extra anxious about something as big as this.
Like you, I recently booked my surgery (2weeks ago) and it's gonna happen on the last week of next month, so I'm about a week short of 2 months from it, I have had but a couple of moments of a very faint thought of worry, but mostly I feel excited and like I can't wait. Just plain suggestions as to what I do when I feel anxiety in other areas of my life are:
-Exercise (anxiety's biggest enemy)
-Lots of water
-a b complex vitamin or a multivitamin at the least (nourished system can cope better) and a healthy diet.
-maybe a massage or 2 as your date gets closer
-hugs and affection from those around you (oxytocin!)
-meditation (properly done, it can help immensely, choose your method, spiritual or not the aim is the same)
- keep extra busy, don't let your mind wonder.
And remember:
Worry is like a rocking chair,
It gives you something to do,
But it gets you nowhere.
Best wishes Hun x