Wa'alaikumassalam! Memang biasa lah day 9 luka czer belum fully sealed, ada yang ambil 2-3 minggu baru betul-betul rapat, especially kalau perut berlipat macam yours. Air tu kemungkinan besar seroma atau fluid biasa dari healing process, bukan infection. A few of my mum friends had the same thing and their doctors said tunggu je, pantang betul-betul, jangan angkat berat atau terlalu bergerak. Tapi since ada keluar air dan you're worried, better check with your gynae or the clinic just to be safe, boleh je during next check-up or call them dulu if it gets worse, they can confirm it's normal for your type of wound lah. Jangan risau sangat, usually everything settles with time and proper rest!