Need more breastmilk

I'm 1 month postpartum today. I haven't been latching baby exclusively. I only rest for two weeks and I Resume my classes in diploma as I'm a sponsored student from a local hospital..I mixed feed my LO. After 1 mth if I dun really latch my LO can I produce more bf by pumping only? I have tried so many supplements but the milk production is not much..how frequent should I pump? A little upset and stress..even though I've already went back to school I still want to give my LO breastmilk..😓#advicepls #pleasehelp