Normal or should I be concerned?

Yesterday my 5 week old was up most of the day and I usually try to get him to bed around 9ish, between 9-12 he was asleep for most of the time, but I took a shower,painted my nails and stuff in the bathroom and came out to him wide awake, but he was being clam so I didn't know he was up(i the door open listing for him the whole time he was in the next room)so I don't know how long he was up cause I took maybe an hour or so. Then he slept from 12ish until 3 to eat, then sleep after he ate until 6:30, he was up for about an hour then went back to sleep until 9, then he was up for a little bit then. But then today he's been sleeping all day. He's been somewhat awake at some points but not for very long. Like 15 minutes maybe, but I can't get him to stay awake. Is this normal? Or should I be worried he's sleeping this much? He's eating fine, normal dirty diapers.