Baby eating less

It’s starting to get embarrassing how often I have to come on here and ask if whats happening and/or is what my baby doing normal. So reason why I’m posting anonymously. My 2 month old had gone up to drinking 5 oz every 2-3 hours, now she has gone down to drinking maybe 4 oz or less again. She seems normal happy baby, nothing seems to be bothering her. It just worries me that she’s not eating like how she was just a few days ago. She drink breast milk