New mom question...

Ok everything I read says baby should sleep around 6-7 hrs during the day and 8-10 at night. He is 9 weeks. Before I went back to work he slept through the night about six hours. The day I went back he started waking up. Also he doesn't really nap during the day and the only way we can get him to nap for a short time is yo hold him while he is asleep.

Does anyone know why he would be waking up and why he doesn't sleep. Or is he doing fine. He will sleep about 4 hours at night. But I am wondering is it a growth spurt... he's hungry all the time and he is big. He is already 25 inches long...

We feel like we are failing at parenting!