What would explain a dull pain in my abdomen 5 weeks after appendectomy?

I had a laproscopic appendectomy 5 weeks ago with no real complications. I have felt fine after a normal recovery. I have been doing normal daily activities, like pulling weeds, and some sit-ups. Now I have developed a lump right above my navel near the incision. It is a dull but still concentrated muscular pain with pain of 3/10 and 6/10 if I apply any pressure. I don't have insurance. Is there a way I can get some advise on what this could be?