Hi , my baby weight is 3.6 when he is born. After 1 month went for check up still my baby weight is 3.5. Doctor advised to give simlac 1 4 Times a day, simultaneously with BF. After a 2 weeks my child weight increased to 4.2 but simlac make my baby restless unable to burb, constipation, and gastric problem, again with doctor advice I switched over nestle nan pro 1 , it s comfortable for him but have frequent urinatione, will my baby gain weight can u advice. Am giving breast feed too.