Help!!!

Erika
So my baby is a month old tmro! But my breast milk has been giving him belly aches guess I'm not eating the right stuff , as well as I only been pumping bc he won't lach on so i decided to stop and let my supply dry up ! I been taking antihistamines and using cabbage leaves . Does anyone know any other tricks , for someone who didn't ever get a whole lot of milk this sure does hurt 😢