Any advice?

I’ve noticed a HUGE drop in my milk supply, and I don’t know why.... I’m talking like pumping out 3-4 oz on each side to now only getting 1-2 oz..I have not changed anything from my usual routine or things I eat. I still try to drink a ton of water and my daughter still nurses... I know pumping doesn’t indicate how much milk you make.. but does this mean I’m starting to dry up? I’ve replaced all my pump parts, but it’s still not as much. I wanted to try and breastfeed feed until she reached 1 year, but now I’m doubtful🥺