I haven't red what the others have said so I am sorry if I'm repeating, but if she's happy then your body has worked out what your baby needs is all! Your bod now knows bubby is sleeping through, but even if she was to wake you'd have enough there to feed.

I was told first time round, only those that express really know how much there is, others just go off how bubby is.... So if she's happy and settled theres enough there

GL with it all, you're doing a great job!