Did I exercise too soon after Mini Tummy Tuck in December? Started doing sit up sad experience pain along scar line.

I had a mini tummy tuck in December. My surgeon said I could start exercising as of 3/10. I started doing sit-ups and recently experienced pain in one part of my stomach, along the scar line. It feels like a muscle pull. Could this be serious or is it just a muscle pull from not having exercised in so long? Could I have caused any damage? Thank you.