Having two types of milk can make him fussy too. Even also the fact that bottles are easier and faster to drink out of than from the breasts because they have to learn to nurse and takes more work. So if he gets mad could be because he just wants the bottle.
Just keep nursing. Some days it may also feel like he's always eating and that fine keep nursing could be a growth spurt.

he may seem like he's eating a lot but quit the formula and every time he wants to eat let him so he can build your milk supply

I was just worried cause he drinks 2 ounces of formula already but he does spit up some of it @amoureux

Thank you @amoureux

The best thing you can do is nurse! That's how your supply regulates. 😊 baby is getting enough.

Thank you ladies for the positive advice @mrsmoore @angiee I'm trying I guess I'll just stop with the formula and just keep feeding and go from there I just don't want him to still be hungry and fussy

Yeah I am just worried because I can breastfeed him but with formula he eats 2 almost 3 ounces at a feeding. I have been drinking mothers milk tea as well, I might have to try a smaller shields to help get a tighter grip on boob I guess. I can have my pump on full speed and still barley get any out.

that's normal you just had your baby your not going to get a bottle full or even four ounces your body makes what baby eats as baby get older and eat larger amount t the more breast milk is produced, the reason why some women quit is because they think they should be making more then that when in reality you just had a baby your body makes what baby eats baby will go through a growth spurt soo. and start to feed more often which in return you will make more ,keep it up 😊

Don't supplement with formula. Just nurse frequently. It can take 5-7 days for your milk too fully come in. Before that baby doesn't need to eat a lot. Their stomachs are small.
Put your baby on you and nurse. Drink lots of water. Eat well.
You'll know if baby is getting enough if he's calm. Fists are relaxed. Gaining weight. And just a happy baby.
I had a hard time pumping. Some times I'd only get half an ounce too. But i know i had more than that whole nursing. Babies are better at getting it out better than the pumps.
Have you tried different speeds and shields?