Should baby be eating more?

Baby is four weeks old today, and is currently still taking 2oz every 2 hours. Sometimes if she gets fussy, it gets closer to every hour and a half. She’s not waking up at night to eat except for once so unless I wake up, she may skip a feed at most. We don’t give her more than 2oz at a time or she spits up everywhere, enough to be at least half an ounce and what seems to be overfeeding really upsets her stomach and makes her fussy for hours with hiccups + spit up galore. Still.. I’m wondering if she should be eating more now that a fellow mom that delivered just days after me is telling me her boy is already eating 4oz every two hours. Do I need to be feeding her more despite her feeding issues or am I on the right path with what I’m already doing?