Eating Habits

Hello everyone. I’m a FTM and I was wondering about my baby girl’s eating habits.

She is one month old and drinks both formula and breast milk. She drinks 4oz on a normal day.

I’ve noticed lately that at night when she wakes up for feeding she can either drink the full 4oz or she will drink 2oz and fall back asleep.

When she drinks the full 4oz she will sleep for another 3-4 hours before her next feeding. When she only drinks the 2oz she will wake up again in 1-2 hours. 😩

Is this what they call cluster feeding? When she falls asleep after the 2oz I try to wake her to keep eating but she’ll just suck the milk in and spit it back out. 😒🤦🏻‍♀️

I do plan to ask her doctor about it at her next appointment but I was wondering if anyone had experienced this with their LO?

Thank you in advance!