Haiyaa, jangan worry lah, kalau perut dia tak kembung dan kentut normal, tu dah good sign! A few of my mum friends yang formula-fed juga sama, some babies poop every 2-3 days and it's totally fine as long as dia tak uncomfortable. Kesian first time moms, kita paranoid je everything. Tapi kalau nak bantam hati sangat, just mention it to your baby's doc at the next check-up, they'll confirm everything okay. Semua baby lain-lain je rhythm dia!