It's easy to say "don't worry it'll be all right" but that doesn't make it any easier. I know exactly what you are feeling, having had my surgery just 3 weks ago today.
Everyone is different, and I'll will admit that I seem to have been one lucky SOB when it came to my experience. I also work at home, which is much, much easier than having to travel to work/school.
I was in the hospital from Monday morning until late Saturday afternoon. I spent much of the Sunday laying in bed or the Barcolounger. By Monday afternoon, I did feel like walking down the driveway and back to get the morning paper. On Tuesday, I actually sat at my desk and did a little paperwork. I did tire easily, but as long as I took frequent breaks, I found that could be productive. By the end of my first week home I was back to working 6-7 hours a day. I am now 3 weeks post-op and all is pretty much back to normal. I drove for the first time yesterday, with no problems. No longer need a chair in the shower, and no longer have the "wonky" head feeling.
I had the translab procedure so I can't say how they will shave the area using the mid-focca. They did shave a small area behind my ear, but now the hair has grown out enough to cover the healing scar. It isn't that noticable, other than my ear, due to the swelling, does stick out more than my other one. I do have a slight droop on that side, but is getting better each day, and should go away completely in another couple of weeks.
As for pain, I really haven't had any to speak of since I got home. They gave me a perscription for percocet that I had filled on my way home from the hospital, but I haven't used any of them.
Again, I feel like I am one of the very fortunate when it comes to post-op effects. I tell you this, not to give false hope, but to let you know that it isn't always a bad experience. Others have had bad experienes, and I feel a bit of guilt posting here sometimes because I did have such an easy time of it.
I'll keep you (and your 15 year old) in my thoughts as the date approaches.