What’s going on

I’m really at a loss as to what’s going on. Breastfeeding is so hard and emotionally I’m exhausted.

My 7wk baby feeds fine at night - satisfied and goes straight back to sleep milk drunk. During the day she is never milk drunk and fusses so much during a feed that after 20min I just have to abandon feeding and rock or burp her to calm her down and hope she just falls asleep. But because she’s not full we repeat this cycle every 1-1.5 hrs.

Weight gain is fine but I’ve had to resort to some bottle feeds (formula and pumped milk) because sometimes that’s the only thing that will satisfy her. Please help it’s exhausting and I don’t know what I’m doing wrong.