Wa'alaikumassalam! Sakit perut 3 minggu lepas C-section boleh normal sih, terutama kalau luka masih dalam proses healing, tapi sebab melibatkan surgical wound, better check with your gynae just to be safe, tak boleh ambil risk dengan ni. A few of my mum friends yang dah C-section kata paracetamol okay if you're breastfeeding, tapi kena tanya doctor dulu lah apa yang safe for you specifically. Food-wise, makan yang lembut, high in protein (chicken, eggs, fish) and iron (ayam, sayur hijau) dapat membantu wound healing. Jangan angkat benda berat and try to rest as much as you can, recovery dari C-section memang slower daripada normal delivery. Muka belas? Check with your doctor to make sure takde infection ke atau complications lain, okay? You're doing great, mama!