MIXED FEEDING FROM BREASTMILK TO FORMULA

Hi. Ask ko lang po, recently I had to mixed feed my baby with formula. Naka latch parin naman sakin si baby since, ayoko sya biglain with formula. Tanong ko lang po, since nag mix feed ako saknya, nagtae sya. Sabi nila normal daw po since nag aadjust pa tummy ni baby. How long po usually ang adjustment period ni baby? Worried po ako na baka mag lose weight sya dahil sa pagtatae nya after feed though konti lang naman ung poop nya. Thank you po sa makakapag enlighten sa situation namin nu baby.