help! 😭

My daughter will be 4 days old tomorrow. My milk came in this morning and she's eating so well and I've found that she's less fussy! (Yay!) my problem is that she gets full off of one boob and the other is painfully full by the time she wants to eat again. I have a pump but I absolutely hate it. It leaves me feeling bruised and blistered and I know it's not pulling out as much as she is. She has reflux problems and spits up every time I burp her, then falls asleep. I want to be successful in this and not give up.. please help! 😩