Breezy55~ have you talked with an anesthesiologist yet? When you do let him/her know what is going on and your fears. Many anesthesiologists handle pain management and this one may be familiar with your concerns and between the 2 of you decide what would be best in your situation.

Check out this link: http://www.rsds.org/4/resources/hospital_protocol.html
If you are going to be inpatient it will be helpful.

Good Luck tomorrow!