36 weeker sleeps all day

My baby was born at 36 weeks and is now 4 days old, she’s doing great but is asleep ALL day long. It’s hard to get her fully awake to eat, she just wants to sleep and sleep. I’m sure this is normal for her gestational age but I can’t help but stress out and make sure that it is normal for her to sleep all day long like this. I just don’t remember my first daughter sleeping all day like this, born at 38 weeks