I had some back pain - pretty bad pain, and the surgeon said that it was because of the operating table and the position they had me in and the length of time for the surgery. But mine was
open surgery a long time ago, and I had my rectum removed at the same time.
As Summer said, I walked kind of hunched over for quite a while, and had to sit and lay in weird positions to find comfort.
It was a long time getting back into pants other than big elastic waisted shorts and lounge paints.
As far as gaining weight, I really battle that all the time.
Sounds like you are doing well - give yourself time to heal. One day you will wake up and say, gosh, I don't hurt so bad today. Keep moving and walking. I probably should have done more of that.
Diagnosed with CD in 1979, many resections and meds
Perm Ileostomy July 1984 at Cleveland Clinic
Disease free since surgery