2 month feeding concerns

Sierra • Olivia & Riley`s mom

I have a 2 month old who is now drinking 4oz at feedings. She cries when shes done which makes us realize she wants more, but she spits up so much of it after every feeding. I dont know if I should have her more or what. The doctor switched her formula with rice in it, so she can be full longer and to help her reflux. She is full longer, but when she's hungry it's still the same thing.