Feeding too often?

Kenzie

I’m a FTM and my daughter is 5 days old. As of today she’s been wanting to eat every hour and a half instead of every 3 hours like usual. Because she’s eating more frequently, she’s also only eating about 1.5 oz at a time. It’s super exhausting and I was just wondering if anyone had some input on it although I will be asking her pediatrician on Monday