i had my op in 2015 when they took out the ramaining bit of large bowel i had left because it was troublesome at the tail end,didnt have any spasms,just a feeling of soreness,but after 3 weeks or so it wasnt as bad as i expected, couldnt sit oroperly but kept to one side,then an infection set in and ruined everything,opening the wound and leaving it unhealed untill last december when i had plastic surgery to close it, i would hope that infection free you will be up and about without pain sooner than you think,but dont rush it,its not worth it, its a hell of a place to have a wound, so here's hoping you get a good result from the surgery