Milk supply/pumping

Al

Since having mastitis I get 50ml on one side and 10-20ml on the other and has been like this for 1-2 weeks now..

Has anyone else experienced this or know how I can up my milk supply again and fix the boob that’s slacking

She’s 4 weeks and wanting to feed more but the more I pump the less I’m getting

I’m pumping every 3-4 hours