I felt really really out of it when I woke up after my bypass, much worse than when I woke up after my sleeve. But the sleeve surgery lasted 26 minutes and the bypass was nearly 3 hours (it went long because there was an issue where they couldn't use the stapler to close the pouch and had to suture by hand). I felt absolutely miserable for a day or two but then started feeling a little better every day. Within a week or so I was feeling much much better.
I don't know if I would say my stomach was sore, externally anyway. I had some weird twinges inside but that went away after about a month.
I don't know what you mean about feeling my stomach or intestines, I didn't have any weird sensations other than the twinges every so often.
No burning senations.
They prescribed me Percoset, and I got ten of them to take home, I only took four, and two of them were just to help me fall asleep for two nights, I didn't need them anymore after that.
I had gas pain after the sleeve, mostly in my shoulders, from the air they pumped in during the surgery. I don't believe I had any this time.
It wasn't terribly hard to move around. They had me up on feet shortly after I woke up after surgery, and then they woke me up every two hours to walk a few laps in the hospital hallway. They recommended doing the same when I got home. I didn't do it that often but I was able to get around OK, albeit very slowly for a few days.
Good luck!