formula to breastfeeding?

Andrea • JPA & DJA 👦🏻👦🏻

My baby is 5weeks now and he mostly drinks formula. He was in the nicu for the first week and I didn’t get my milk in until the second. When I pump I hardly get 2 ounces from both breasts. I try to offer baby breast before feeding any formula he stays on for sometimes 10 minutes or more most times 5 minutes max before he starts to get angry I know milk supply is all supply & demand would it be ok to start just breastfeeding him to see how it goes? To see if I can infect produce enough for him to EBF?