Have you started doing more activities? You might be overdoing it a bit - it takes your body a good few weeks to recover from a natural birth, and a c-section takes more recovery on top of that. I'd definitely mention it to your doctors or midwives, and keep an eye out for pain, smell or other signs of infection. I bled for 6 weeks after my c-section, and I knew if I'd overdone it because the blood would be heavier and bright red again.
Take care of yourself x