What Causes Frequent Urination And Diarrhea In Infants?

HI DOCTOR, ITS REGARDING MY 2 MONTHS OLD CHILD I WAS EXCLUSIVELY BREAST FEEDING HER AND SHE WAS PASSING OUT URRINE OFTEN AND PASSED STOLL ALSO AROUND 5 TIMES,I AM A WORKING WOMEN WHEN WE SWITCHED TO EXPRESED MILK AND FORMULA,SHE IS NOT DRINKING MILK FROM BOTTLE AND WHILE SHE SLEEPS WE GAVE HER LITTLE MILK ,COULD YOU PEASE TELL ME HOW MUCH MILK SHE SHOULD TAKE,AND HOW OFTEN SHE SHOULD PASS URINE,SHE DOESNOT TAKE MILK ANDCRIES SLEEPS OF WHILE WE FEED ,THANKS