Can my 7 week old oversleep?

My 7 week old frequently sleeps through the night (11:30pm to about 7:30am-8am), followed by 1 to 2 2.5 hour sleeps during the day. My GP told me to be thankful but I am concerned that she is sleeping too much. Is that possible? She is formula fed and is a pretty contented baby who isn't much of a crier.

Thanks!

Enjoy, she is doing just fine.
Cheers Maree