How many consecutive hours does you baby sleep during night? please read?

my baby is about to become 5 weeks old tomorrow and he sleeps 6 and a half hours uring night.. He goes to sleepat 9:30 pm and wakes up at 4:00 am, he drinks 4 ounces and sleeps another 3 hours he also take several naps during the day.. is that normal?? im kind of worried. thanks to all answers