Sleeping too much?

My baby is a month 1/2 & I usually leave him in his crib at night. He sleeps anywhere from 3-4 hours. He'll wake up and then I bring him to bed with me, feed, & he goes back to sleep for another 2 hours. I'll feed again and he will go straight to sleep. This goes on up until about 10-11am. Is he sleeping too much? He'll stay awake for a bit while I change his diaper but he won't be up for more than 10 minutes sometimes. He's been growing fine & has enough wet diapers throughout the day