Worried she isn't eating enough

Maddison

My two month old has been sleeping more and more the last couple days. Last night I fed her at 7pm and she went to sleep around 9pm and didn't wake up again to eat until about 3am.

She woke up this morning to eat at 6:30 and 8:30 then went to sleep until 2pm.

I am worried she isn't getting enough to eat. Is this normal behavior for her age?