Your body shape has changed. Your skin, muscles and other connective tissues stretched during your pregnancy and have not yet returned to their previous level of tension. This has probably led to an excess of skin/flesh immediately above or actually hanging over your scar.
The six-week post-natal check-up as you postpartum 'checkout' is wildly inadequate as, for some, the repercussions of pregnancy can take a while to surface. Pregnancy took 9 months, and it is perfectly reasonable that our bodies can take at least that long, if not a year or more, to fully recover.
Backache and urine leakage, for example, suggest a weak core. Without strengthening your mid-section and pelvic floor, pelvic organ prolapse is a real risk. Your core includes your pelvic floor, and the entire system needs to function optimally for a strong midsection.
The best feedback I can have are smiles - and I have learned that standing on the upper stage on the Royal Mile and yelling about incontinence at the people passing by makes them smile. Though, some of them may have been grimacing.
Beyoncé has appeared in public looking incredibly slim, and showing little sign of her recent pregnancy. She only gave birth to Blue Ivy Carter six weeks ago, and fake-bump rumours aside, she looks incredible!