Be prepared for what will appear to you as outrageous swelling and spectacular bruising. The swelling increased for a few days, from my cheekbones to under my jawbone. I could not open my mouth properly or chew, so I lived on soup, liquidised/mashed food, milkshakes and ice-cream for nearly a week. The bruising appeared as the swelling went down. It tracked down the sides of my neck to my collarbones. It was not painful, but looked very Halloween 😆
The pain was really not too bad. Much better than other procedures I have had. I had a pain relief injection shortly after I awoke, but needed only paracetamol after that. Have a couple of extra pillows available to help you get comfy at night.
I had 4 out in one go under GA. The bottom two were very inconveniently positioned on their sides and pointing slightly downwards. The surgeon cut them up and removed them in pieces, rather than cut away more of my jaw bone. I could use a straw because I was not at risk of dry socket. The teeth had not yet come through the gum, so there was no hole in it and the sides of the wounds were completely sewn together with dissolving stitches. But the swelling made the stitches uncomfortable and I ended up sucking at one of them until it burst - instant relief.
Nearly 2 weeks after the op, I was at work one morning and noticed that my reflection in the computer screen looked odd. The swelling seemed to be coming back. By the time I went home I was definitely swollen, though I still felt OK. But I called the number I had been given for after-care, who said I had an infection and prescribed antibiotics. By then it was late in the evening. My dad has to drive quite a way to the nearest all-night pharmacy to collect the antibiotics. By the time he got back home I was running a temperature and beginning to feel ill. So I was quite glad I had not waited until I felt ill before calling.
Hope all this does not worry you and that your op and recovery go smoothly.