Are you trying to avoid as much as possible any foods/drinks that contribute to the gas? Also walk, walk, walk as often as you can even though it is difficult.
My husband's main pain/discomfort was due to the rear area sewn up which took about a month as I recall.
The gas type pain probably went away within a few weeks so hopefully you are very near to that stopping.
Wife of 64 yr old male suffered with UC & in May 06 had a severe flare & hospitalized 6 days...various prednisone treatments leading to steroid dependence and osteopenia, 12 asacol, 200 mg Imuran, failed remicade infusions Jan-May 2010 Dependence on pain meds. Made decision 6/10 to have surgery which was on 12/17/10 (total proctocolectomy & ileostomy - unable to have the j-pouch) & now pain free