The only time I have been able to observe the process with me as the subject, it was terrifying - The stainless steel walls shining, the light, the anesthesia coming on, the feeling of "what have I got myself into", as you fade out, while they are wheeling you into the cutting room...
Then when I woke up, I HURT!!! - the painkillers were just keeping the edge off - (it was hernia surgery) -
A few days later, the pain was lightening and the painkillers were working well - the dressing/redressing and leakage was getting better, and I felt better about the whole process. It was a temporary pain for a longtime improvement, so it was, overall, OK.
The two other times I was in surgery, I was not conscious anywhere near the surgical theater - One was the result of a Car Wreck, and the other was for a gunshot wound - (head shot) - both went well. (I had a really exciting and interesting childhood/young adulthood, with many experiences not too common to most people.)
You will be OK.
Here's to your quick and boring recovery, and to little or no pain. The Doctors and Nurses are there to make the process go well. If there is Pain, do not try to gut it out - tell them! Pain control actually is an important part of the healing process - more pain makes for poorer healing.
Facial surgery will possibly result in strange feelings, but it will gradually go away, or you will get used to the sensations and/or lack of sensations. For years after my facial restorations, there was a spot on my cheek that if you touched it, I would also feel the identical sensation on my lip, on the same side. I still have a couple areas where it is more sensitive to touch, and itches wierdly, but it is usually not uncomfortable.
Good Luck!