Breastfeeding H E L P

Rocio
My baby is 3 months old, and I am back to work (full time) and I have been able to pump work but recently and drastically my milk production dropped to the point where I can only get max 2oz on each session of pumping. Also my daughter doesn't seem to be a fan of my breast anymore, she gags every time I want to breast feed her. I feel kind of sad knowing I might not be able to continue breastfeeding like I was hoping for ...What suggestions do you have that can help us??? ..... Ty