Best way to up milk production...

I am really up for anything, and tricks and tips to up production... I use to produce a lot of milk (he's 2 months old) but these last 3 weeks it has hit the floor for some reason and it's getting really frustrating. I breastfeed him every time and pump while doing it and/or pump after and I am down to only producing maybe an ounce each if I'm lucky... I have no idea what's going on. But I'm hardly making enough for him to eat and he's still always hungry after eating for 40-60 mins and needs almost a full bottle after... idk what to do anymore... any help or advice is greatly welcome.