Hi, I wouldn't worry overly much about the pain just yet. You are only a month out of surgery so your muscles will still be healing and settling down as well as everything else. My doc told me that after 6 weeks things would improve and then after 8 weeks things would really settle down. Even now about 14 weeks after surgery, I will still get a sharp 'tug' if I lift something really heavy. At the same stage as you I could still feel a really hard, fairly big bit of scar tissue under my belly button, now though it's all gone really soft except for a little bit that feels the size of a peanut. Also I think you may need to still watch what you eat for a little while longer
I also never had any scans to look at the operation site and the surgeon has only done an outside visual of the scars and prodded my belly - everything is nice and soft so she was a happy chappy with her work.