What Causes Abdominal Pain After Ulcerative Colitis Surgery?

Hi, I have recently (2 weeks ago) had ileostomy reversal surgery for ulcerative colitis. This was the 3rd and final operation, having previously had a colectomy and j pouch formation surgeries in the last 7 months. All is going well and I feel fine, though I have a very mild and dull ache in my lower left abdomen which stretched to just below the bottom rib. My initial concern was a potential hernia. I feel that this is unlikely however as I have no lump/protrusion, had all surgeries laparoscopically, have been extremely careful not to strain my abdomen and I am in excellent shape with very strong abdominal muscles. I am tending to believe that this dull pain may be due simply to very frequent bowel movements over the last 2 weeks. Does this seem plausible in your opinion?