Take a photo of the stool and describe as much as you can (color, smell, texture, are there bubbles, etc.) best to bring him to the hospital for lab tests especially stool sample test before giving him any meds. Keep him hydrated (Pedialyte, Vivalyte, etc) napakainit pa mandin ng panahon. Check if ripe banana would help, that's super effective for my little one when he has watery poops then ripe papaya naman if constipated. Sana maging okay na si baby 🙏