I think my milk is drying up...HELP

My little girl was born the beginning of January. I used to have great milk production until a couple days ago. I can barely even pump an oz with both breasts combined...I used to pump 8-10 oz. 8 days ago I had to cut out dairy because my baby is super gassy/uncomfortable. I thought it was helping but now she's back to being super fussy and I think it's because shes not getting enough milk...I'm trying pumping more and having her eat more...I'm drinking lots of water...idk what to do 😭