Talk to Pediatrician on Mother Feed

Mera beta 2 and half years ka ha mother feed nhi chor rha. bht koshish ki ha khaana khata ha sahi but doodh bhi mangta ha or na dain to bht rota ha halat buri kr leta ha vomits krta ha. mujhe smjh nhi aa rha Kya karon kisi ne btaya ha k breast feed stopping medicine hoti ha wo le lain kindly suggest me ye safe ha, agr safe ha to Kon se medicine lain