Max 2.5 ounces BF

Pam • 🤰#2 due 1/2022

I weighed my son before and after a nursing session today. It usually takes him 45 minutes to nurse from both breasts. At one month old he was taking 2.5 ounces (measured at the LC’s office). Today at 8 weeks he is still only taking 2.5 ounces (measured at home), but when I bottle feed him he takes almost 4 ounces of expressed milk and is much less fussy afterwards. What do I do? Top him off afterwards? Only pump?