Thanks for your query
I understand your concern.
Your baby has acute enteritis
which is mostly viral in nature and settles in few days.
Since pus cells are less than 5so nothing to worry.
Most important is to maintain and monitor hydration.
Continue with breastfeeding
Give oral rehydration solution sip by sip in case stools are watery in nature.
2 times a day for 3to 4 days and zinc for 14days after consulting your doctor.
Watch for features of dehydration
like decrease in urine output/refusal of feed/lethargy and in case you observe any get him examined by pediatrician
Wishing your baby good health