newborn poop

Please tell me this is normal. Baby boy was born on Sept 28 and at first his poop was the new black tary kind. Then it became normal poo but was soft like diarrhea and now it's almost straight water. He eats a lot and poops literally everytime I change his diaper. There is nothing solid. It's more the poop stained water. Every article I see says it's normal but it just worries me and first pedi appointment isn't until tomorrow (hopefully, we didn't have time to make the appointment after finally picking someone and then going into labor.)