Supply decrease after mastitis

So I had mastitis pretty bad recently and was given dicloxacillin every 6 hours for 10 days. I have a slacker boob and of course the mastitis happened on the side that produces more. Ever since the mastitis I’ve noticed a decrease in my supply and my LO seems to get frustrated that not enough milk is coming out during feedings. Does anyone have advice on how to get my supply back up after mastitis?

My LO is 3 months. I’ve been keeping up with my water intake, eating lactation cookies with oatmeal, flax and brewers yeast. Any other suggestions?