Ay, sa 2 weeks pa lang, 3-4oz per feed is actually okay na, kaya mo yan! A few of us sa mommy group namin nag-worry din about the same thing, pero ang pediatrician said na babies know when they're full, especially kung mixed feeding ka, kung sated na siya sa breastmilk, mababa lang ang volume niya, pero pag gutom talaga siya, kailangan niya more. Since di siya gumagamit ng pacifier, siguro talaga siya thirsty o hungry lang talaga when she's fussy. Check din kung hindi ba siya gassy or uncomfortable from the feeding itself, kaya parang gutom pa rin siya after? Best to run this by your pedia though just to be sure she's on the right track, especially since mixed feeding setup mo.