Girls, please help me!!!? We were on GVB! It's been 2.5 months, in the…

Girls, please help me!!!? We were on GVB! It's been 2.5 months, in the last days my breast is soft and there's such a feeling like empty, I read that it's normalizing lactation at this time (but still seems like the baby is hungry, sucks nervously and diapers changed less often, noticeably that she writes less ?How to fix GVB? Or how did you understand that you need supplementary feeding? Please share ??