Supply Drop?

Ch

I’m the last month in a half/ two months I’ve had Mastitis twice and i feel like I’m not producing as much anymore. I would easily get 6oz out of my right boob when i pumped for a bottle and around 4 maybe out of my left “slacker boob”. Idk if it’s just in my head but I’m worried I’m not producing as much anymore. Any advice? My little one is almost 4 months old.