Alhamdulillah, 10 hari tu memang normal lagi baby belum fully adjust, jangan worry sangat kalau kadang sendawa slow atau tak keluar, setiap baby different! Aku dengan a few of my mum friends, we found out yang patting gently di belakang (bukan hard) sambil baby in upright position or tilted forward over your shoulder works best, tapi honestly the positioning matter lebih dari how lama you try, some babies just tak perlu sendawa sangat especially kalau dia comfortable je. Jangan stress kalau after 10-15 minutes tak keluar, just let him rest lah, most likely dah fine pun, dan yang penting make sure after feeding tunggu abit before laying him down flat. You're doing great being observant like this!