My daughter who is 3.5 months old weight 5.8kgs. Her weight during birth is 3.39 kgs. Is this under weight? I contacted a local pediatrician. He said my milk supply is not enough for the baby and asked me to given similac. I feel my milk supply is enough. My daugher refuses to drink milk from me and she is playing. While she is half sleep she is drinking well. I tried expressing the milk and given in feeding bottle and refuses that too. As per doctors advise she is refusing similac too. So I compeled her using a cup and pored in her mouth. I feel guilty about it. What should I do now? Please help.