Pre Procedure Angst

This is a long story but I will try to make it short.  I have another procedure Friday.  I am pretty nervous about it.  Last month I had a bad experience when having a biopsy done, which the surgeon admitted was pretty deep.  This month I am having the rest taken out and then fulguration done.  Last month the surgeon said it was too deep to remove all of it.  Now he says he is going to try.  He said it was unusual because normally with a low grade dysplasia the area is flat but there is substance to this, meaning he can feel it and it is deep.  This is the third time this will be done in this area.  I am thrilled that my cancer was caught so early but still have a lot of dread about the procedure.  First cancer in situ, then high grade dysplasia and now the low grade area beneath it all.  I have had many surgeries in my life and have to admit I have never been so nervous. 

The main reason I have so much dread is obviously the pain.  While the worst of it lasts only a day or two, it sure smarts.  The surgeon said this WILL be very painful, especially because of the fulguration. 

Next reason is the post op nurse I had last time.  She spent 30 minutes questioning why I had pain and said I shouldn't have so much pain there are no nerves in the rectum.  I kept telling her it was not my rectum but my anus.  She would not give me any pain medication.  Before I became conscious she talked to my husband about how I was crying while I was still unconscious.  Something that is really hard to prevent btw.  My husband assured her that I am pretty tough when it comes to pain, so obviously it must be pretty painful.  Anyway when she did finally give me a shot of morphine I was much better.  However, when I got home my husband proceded to tell me other weird things she did while I was in there.  For the first time in my life, I made a complaint after hearing what my husband had to say.  The surgery center said what happened was wrong and will never happen again.  BUT I have to go to the same center Friday.  I am one not to burn my bridges and wish I had not made a complaint.  I know better than that.  She wasn't mean she was just goofy.  Had I not still been under the effect of anesthesia, I probably would have let it go.  I told my surgeon about it at my post op appt and my pre op appt (combined) a few weeks ago.  I said I think there was confusion over whether this was the rectum or the anus and they often are coded together.  He said he would make clearer notes for the next surgery. 

Anyway, I can't quit thinking about a potentially vengeful nurse.  I know that is silly but anxiety often wins over logic.  Any similar experiences/advice?  Although I really don't have much of a choice, I have to get this done.