Hi Tiffany, congratulations!
I had my RYGB many years ago and it was major surgery. I remember taking a lot of liquid tylenol with codeine and sleeping as much as possible, but also had to get up and make my own food. Mostly I ate cream of wheat and mushroom soup made with Magic Milk (search for the recipe here), which was fine. I also vomited a few times, which was horribly painful because I had a 7" vertical incision from my navel to my sternum.
These days it's nothing like that. Many people have shared here that they went back to work in a day or two. You should search the group for stories, but seriously, I find it hard to believe anyone has extreme pain with today's advanced surgical techniques. The liver-shrinking diet is something relatively new, but seems like a really good idea. The surgeon has all kinds of room to work, so I'd assume it was far less painful, or even very uncomfortable. But I hope others will respond and give your modern details, since I'm about 15 years out.
My guess is your discomfort will only last a couple of days. I do think it's a better idea to get up and walk as much as possible and not to seek accommodations to shift your position any more than you normally would. I don't think you'll experience a "rough few weeks." But again, search the group for true stories that are recent.
Most people will tell you this was the best experience they ever allowed themselves to have, and I think that's true. The difference in quality of life before and after surgery makes any discomfort seem trivial. You're right to be excited!
I didn't have to restrict my diet, but things happened so fast. I was at my internist's office one day, he suggested I lose 100 pounds, and while I was still sitting there, whipped out a form letter he sent to the feds to get Medicare approval (I was disabled so was on Medicare, even though I was in my 50s), printed a copy with my name plugged in, and scheduled the surgery for a week or so later, as he was about to take off for a month's vacation. I had surgery less than a week later.
I'm sure others will chime in to respond to you. But really, good move, you've made the right decision, so just try to enjoy what is to come!