How much breastmilk ?

I have developed mastitis on one of my breast, so I have been pumping until I feel better. My question is, how many ounces should a 3 week old take? I’ve been giving her 3oz, but sometimes she is still fussy and wants more. So I give her another ounce. Sometimes even after that additional ounce she wants more! I feel like it’s too much for her?! I’ve tried a pacifier but she’ll suck on it hard as if it is the bottle and spit it out and keep looking for my nipple.