Supply dropping help

I'm 11 months pp and I can tell my supply is dwindling.

I've been power pumping 2 times a day, plus feeding around the clock. I had finished my period a couple days ago and it usually will increase after its finished but not this time. My pumping output is barely anything and I can tell my baby is getting frustrated at the breast.

I tried supplements in the past and it didn't work. The only thing that did work is oatmeal which I'm already eating every day, drinking coconut water and body armor, eating well. I feel like I'm failing and nothing I do is helping 😔