Sleeping Habits

As

My 6 week old son usually sleeps 9-3 then 330/4 to anywhere between 530 and 9 am - if he wakes up before 8 then he will have an ounce or so and nap until 9. The last 2 nights he's been sleeping 9 to 4/5 am straight then his usual feeding and back down until 7-9 am then he's up for the day. Does this seem normal? I'm not complaining but I feel like this is a long stretch

and I'm up every 2-3 hours to check on him.