Loose motion medication. Of econorm.

My baby is two months old, is suffering with loose motion, breastfeed is not there because insufficiency of milk. Im using nan pro 1. My baby cries before passing toilet. And he is getting loose motion in water content in yellow color once greenish once it changes color and stomach pain, vomits has a big boy. Nearest pediatrician suggested bio gaia protectis baby drops 5 drops a day with bottle milk, before feeding.im using this since ten days but no improvements in child. Vn im consulting he is telling its common but im not satisfied vth his suggestion and he suggested econorm sachet it was controlled little bit how long i have to use these sachets. Before one month my baby stool was twice a day that to in mehandi green Colour. But now he was passing when I feeds with bottle at that time itself he releases a loose tool with and gas sounds . Now my baby weight is 5.5kg he is increasing his weight but not reducing loose motion any other medicine instead of econorm.