Sleeping baby..

Je

Okay so my son is a little over 9 weeks old and last night he fell asleep at like 9:30 and slept until 6 this morning. I was extremely happy about that, but he's slept basically all day long only waking up to eat. Usually he's awake almost all day and playful. Could this be a growth spurt? Could he be sick? Is it normal? I'm a FTM so I'm a little nervous about everything lol