Decreased supply

Hi. FTM & first post. My daughter had her one month appointment and her pediatrician told me that im not producing enough & my supply seems to be decreasing. (ive worked with an LC from my hospital, still pumping every 2-3 hours. added one power pump to my schedule and got fitted for the right flanges.) Been very discouraged to continue pumping but I'm trying to keep going for another month. first two weeks i was producing 2-3oz per session, and i tried to latch her one day and my supply dropped so i assumed she wasnt latching properly. now every session is 1oz or less. sometimes a little more. power pump sessions get me like 3oz barely. Total output lately has been 8-10oz. Im trying to up my water intake (i struggle w this) and eat more protein. I feel like Im getting absolutely no where, and Im unsure what to do. Im trying to find a different LC since the ones at the hospital have a had time fitting me for my flanges due to my nipple piercings (i have scar tissues on the sides and milk comes out from there also) I also know I need new pump parts but the website i use hasnt even contacted me since im trying to get it through insurance, and they havent even contacted my ob office. I have the pink Spectra and just gonna order extra parts on amazon myself at this point cus I think i need to replace my duckbills. I also use formula to supplement and still trying to nurse her but thinking of stopping now since it seems like we are still having issues latching. I just need support or help on increasing supply.