Please help. Supply dwindling

I’ve been doing everything I can. He’s feeding off both breasts. Pumping in between feedings (every 2-3 hours). I’m eating Lactation cookies, apricots, oats, making smoothies with a Lactation powder, coconut milk, coconut water, staying hydrated and I’m only getting 3oz total combined when I was getting 6-8 before. I’ve worked so hard to be able to breastfeed after a rough start at the hospital and now I’m feeling close to defeat. Please help. I’ve already ordered legendairy products but we’re out of town till Sunday.