Talk to Pediatrician on Feeding Problem

We have 2 month daughter. After birth dr. Suggest us NUTRAFIL 1 formula milk. We were give her with mother feed. She got Pneumonia in November admitted in hospital. after treatment doctors said to us don't give her formula milk. Only give her mother feed. But due to deficiency of mother feed and baby also don't do effort to take Mother feed. Her weight was gone to decreasing and her weight is approx 3kg. After some days we have again check her from child specialist. Dr. Suggest us with mother feed we can give her LECTOGEN 1. We give her LECTOGEN 1 but she didn’t take mother feed due to deficiency of mother feed and also not effort to take. Please help us how we can increase Mother Feed supply and how our baby can try for mother feed. Thanks,