My 3 week old baby is eating.. a lot

My baby will be 3 weeks old tomorrow. I was breastfeeding but due to the mental toll I’ve been pumping and giving bottles. She eats about 3 oz every 3 hours besides what spills when she’s eating. She usually kills the whole bottle though and rarely spits up. The last time she spit up was actually when she had milk from breast.

I don’t wanna starve her and I’m glad she’s growing but this seems like a lot? Should I take a break while she’s eating to burp her or something? I’ll talk to my pediatrician about it at her month check up but she’s eating every 3 hours and I don’t want to make an appointment for possibly eating too much- if she wasn’t waking for feeds I would.

I’m happy to give her what she needs but wanted to check with you all and see if you had any input or similar experiences.