Gp doesn’t see any concerns but I’m concerned the poo indicates something
Gp has given us oral antibiotics for thrush which I believe he doesn’t have because I see nothing inside his mouth
I’d ask to see a different GP to be honest (assuming your surgery has more than 1)
I second that. The poop does not look regular
Looks a lot like cows milk protein allergy stool
Yes take him to see his pediatrician or to urgent care.