3 oz too much?

My son will be 2 weeks old on Tuesday and he is formula and breastfed. and today I had to up his bottles to 3oz instead of 2oz. I noticed when I gave him 2oz of formula today he was still acting hungry, giving me cues that he still needed food. So I gave him an oz of breastmilk that I had pumped to see if he would finish it. Next feeding I gave him 3 oz of formula and he finished it. I'm just worried that he may be over eating? No opinions on formula and breastfeeding please! Should I just keep listening to his cues and if he finishes 3 oz then keep giving it to him? I just feel like 3oz plus breastfeeding sounds like a lot at only about 2 weeks. Thanks!