DD2 was born last week at 36+3weeks and due to health issues, she is in NICU and unable to breast feed so I am stuck with pumping.

We are on day 5 and I just had a couple of questions.

When I first started using the pump, the mw told me to do 10 minutes, I'm now doing 15 minutes but should I be doing longer?
Today, i got about 45ml first thing this morning, and then around 30-35ml since then. Is this about right for day 5? When should I expect to get more?

Any tips for exclusive expressing?