Pumping, supply, mastitis

I pump between 1 to 3 times a day along with nurse my daughter, she has dropped 2 night feeds so I wake up to pump for one of them. The problem is I used to get 2oz a breast, but since having mastitis my ducts were SOOOOOOO fucking clogged and full that I barely get an ounce. What can I do? I'm a STAHM but I'm trying to build a just in case freezer stash because that's the only way my daughter stayed on breastmilk when I had surgery 4 weeks pp. (she ate through 30oz of stored milk and I pumped every 3 hrs)

What can I do to help my supply come back? The largest ducts in my left breast were clogged so bad it took 3 days to clear them. My right was only 1. 😭 I make just enough for my daughter and I haven't been able to store much since other than when I pumped out the clog. I'm still on 500mg if cephalexin 4x a day.