Baby weight gain

Born 5lb 9oz

3 days 5lb 6oz

4 weeks 5lb 11oz

7 weeks 6lb 5.6oz (went in for some belly issues, 2 month appointment is July 12)

The pediatrician really is pushing to supplement with formula, but I just don’t feel the need to. He told me she needs to be drinking 30 oz a day. When I give her a bottle she can barely finish 3 oz and passes out for almost 2.5-3 hours after. Her eating pattern did change for a week or two she was every 2 hours for 20 minutes then she went to every 45min - 1.5 hours for 10-15 minutes, sometimes less. But I quit drinking dairy and improved our latch in the last 5 days. So now she is eating anywhere from 20-30 minutes every 1 hour 45 to 2 hours. Should I wait until her 2 month appointment and see her weight gain then? Or go to a IBCLC now and see if there’s an issue?

He said this means she’s gaining 14grams a day and she should be at 30. Then backtracked and said small babies do gain slower?? I’m honestly on the verge of switching peds.