Mommies I need advice, my son is almost 4 months old and at the beginning we supplemented with…

Mommies I need advice, my son is almost 4 months old and at the beginning we supplemented with formula. And we haven't since he was two weeks old. Well now he can stay latched for 10-15 minutes but in 30 minutes he is acting hungry again. My husband says to just give him a bottle. And yes it's aggravating and I can't get anything done. So we finally gave him a bottle of formula and it seems to be doing a great job. Idk wether to just go to formula or what to do really... help?