Hi, my; 4 month old baby does not want to have milk. He always cries whenever i try to feed him. Other than feeding time he never cries. He is on combination feed. He does not want to have both breast milk and formula milk. He is always trying to put his thub into his mouth and he is always trying to roll over to lay on his tummy. He is trying to roll over even during his sleep 😂😂. Plz suggest what to do in this situation. I m worried about his weight gain.