Need help

I have been exclusively pumping since Monday (Lo is 8 days old). Two days ago I was getting 2oz/pump, and everyday it's gone down a tad. I'm trying mother's milk tea, lots of oatmeal and keeping on a very strict schedule (every two hours during the day and three at night). My breasts are horribly engorged and I'm struggling with that along with supply. Any advice? I'm willing to try anything! I'm even trying to power pump as I write this 😁