I know exactly how you're feeling right now because I was in the same place a few months ago. I had a Wide Excision of the Vulva in August, for a diagnosis of VIN 3. My doctor said I needed surgery to take off the area and give me a few stitches. I guess what I can do to help is share my experience and hope that it helps you anticipate the events. Really as scary as it sounds it was not all that bad.
First you will have a preop visit with your MD to discuss the plan of care and your outcomes, you may have blood drawn at this time.
On the day of surgery you will change into a hospital gown, have an IV started, and meet with a nice anestheologist who will give you the "happy meds" The nurses and doctor will meet with you too before you are medicated and taken into the OR.
I dont remember much after being taken to the OR, other than they said I would do just fine... then I woke up in recovery. I was not having pain then because the Dr. gave me a local anesthetic. I was very sleepy and drifted in and out for awhile before I really woke up. The nurse will be monitoring your heart rate, temperature, and respirations. She will also help you get up when you're ready. I was medicated with nausea meds before surgery so I didnt get sick, but when I got up to goto the bathroom I was very nautious and broke out in a cold sweat. The nurse medicated me for that and the sick feeling went away.
I was scared to pee... but it didnt hurt because I was numb down there. The Dr. had to take a little more than she thought she was going to because under a colposcope in the OR she found more abnormal cells. So I had somewhere around 20 stitches that ran all the way down one side, around the bottom of my vigina and half way up the other side. I lost one of my labia minoras, and half of the other, but other than a small scar everything down there looks pretty normal.
A few supplies I would get youself before surgery are:
a hemoriod doughnut pillow, this will be great for the car ride home and any sitting down you will have to do for the next week. Dont expect to sit straight for a few weeks.
a peri bottle to rinse off with after you void. you can dab with toilet paper but rinsing with warm water doesnt hurt at all, just make sure you can get dry afterwords, some women I've heard use a hairdryer on no heat setting to dry off. I just dabbed with toilet paper after I used the peri bottle.
a sitz bath, I got one before surgery at the drugstore but also got one from the hospital before I went home. This is great, so soothing and it keeps everything clean down there. I used it two times a day.
Ice packs, I got gel ones that are reusable, but anything would be ok as long as its not too big. I found ice really soothing too for the first week.
Unscented pantyliners... you'll leak a little bit.
lots of pillows, when I slept at night I would sleep with a pillow between my legs so it didnt squeeze the area at all, it was pretty comfortable.
bacetracin ointment... this my Dr. prescribed for me and I went home from the hospital with it and applied it to the stitches twice a day.
Ibuprofen, I took prescription stregnth and it was fine, they also gave me a narcotic pain reliever that I used for the first week so that I was fairly comfortable.
I would have to say that I was pretty much off my feet the first week, by week two I was doing small things around the house and feeling better and week three I was wanting to go out and do things again, but I was still sore... just a little achey is all, ibuprofen helped the most. The stitches are dissolving, and it took almost six weeks for all of them to fall out. It took a few months before I was really ready to be active with my fiance again, and it kinda hurts still but its getting better every day. I'm just thankful that I didnt have any cancer underlying the VIN 3 cells.
Anyway I hope that this will help you. Good luck with everything. You will do just fine, it sounds much worse than it really is. Just remember to take it easy for a few weeks, take your pain meds when you need them, and you will do great! good luck :)