How do you know if you have torn the internal stitches or pulled the muscle repair loose after a tummy tuck?

Had a tummy tuck 10 days ago. I decided to go to the store and over did it on the walking. I could feel a lot of pulling on my stomach and my back was killing me. Had burning sensation throughout my stomach. The next day my stomach wasn't sore and stiff and I don't feel as tight like it was before. I don't see any physical changes. Could I have pulled my muscle repair loose or tore my internal stitches?