A mess

So I have been breastfeeding my newborn and she's pretty much around the clock feeding now, saw a lactation specialist says nothing is wrong etc. I'm exhausted and convinced she's not getting enough due to she has been waking up in an hour or less crying and giving cues. When they estimated what I fed her it was 1.3 oz, which they said would like for it to be at least 2 oz. I have tried and tried and finally broke down today and called her pedi. She's a little over a week old and only put 1 oz. back on. They say it's fine but I don't feel it is. Don't judge but I think I'm done bf and they gave me the direction to go with formula.