Hi Maymamma, welcome to BW!
Oh dear, that is such little day sleep for his age. What is your general/loose routine right now? Can you list it in EAS format?
Does he show any signs of discomfort? Kicking legs, grunting, spitting up large amounts, mucousy bowel movements, etc.
Does he nurse more frequently than you remember to with your first? I would ask the pediatrician at his next visit, or set one up, to see if reflux or something could be an issue.
Does he show you sleepy signs around the 1 hr mark or before? He may be one of types that require a little bit more A time... like my son.