The answers are 1) not at all 2) You can return after 2 days, but since your mouth/lower lip is still a bit numb, I'd recommend waiting 3-4 days. No one will notice you had surgery.
3) I had a size small, though Dr. Antell's choice was a medium or small/medium (i.e. shaved down). Most women get mediums, but I wanted a very natural / modest improvement and Dr. Antell supported my decision.
I would recommend going back to work after 3-4 days - no one will notice.
I had an incision through the inside of my mouth.
I went home without a bandage or anything at all on my face - 2 hrs after the surgery, strangers on the street would never know I'd had surgery! I thought that was pretty cool. iven my stitches were on the inside of my mouth. I had a very minor bruise that showed up Day 2. I walked about 10 blocks for fresh air....