Hi,
In my opinion, you are consider an oversupply. Because your baby is only taking 90ml, most of the time direct latch. Means one day you will need to store up ~500ml. For me, it is a lot.
You can reduce the pump session slowly to let your body adapt to the changes. The 12am can reduce because your baby last latching is 10pm. At least you can have an early sleep.
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