Confused !

My 2 week baby eats about 3 oz per feeding but sometimes she wants more and I do everything to see if it’s anything else bothering her but she still looks hungry so I give her more but I feel like it’s a lot for her tummy but she does even spit up the extra I give her her belly doesn’t feel hard she gets her gases out perfectly am I doing wrong for feeding her extra ? ☹️ I don’t want to over feed her but she doesn’t stop crying if I don’t give her more help!?