All good as far as I can see. I have to say that, expressing tells you absolutely nothing about the amount of milk you have for your baby - nada. And even if you knew how many mls she was getting it wouldn't tell you anything about how much she wanted or needed. And the scoop is - for babies food is not the main game in regard to breastfeeding - it's the relationship. The closeness to you is what she wants and that's more important than the milk. It's normal to be tired, and normal to wish it was otherwise - but you know you are doing great