I'm so sorry MrsH, I've been there and it's one of the hardest places in Earth.
From one NICU mum to another, stop reading the notes. Be there for ward round if you can and get the nurses / docs to explain everything but seeing it in black and white with words you possibly don't understand (yet! You will do) is just too hard.
What do you do during the hours you sit there? We read incessantly. Lots of kids books - he'd done Wind in the Willows, Peter Rabbit etc all before he left. Sometimes women's magazines if that's what I needed. Made up stories. Songs. Anything really.
Can you help with her cares yet? Once I could do even little bits it helped make him feel more mine.
Hand on tummy and hand on head makes them feel like they're being held.
If your supply comes in and you want to, pump and get the hospital to freeze it for when she can take milk
I don't know how poorly she is or what issues she has at the moment so it's hard to say anything else except you can do this, you can because love will push our scared bodies through the most awful of times.
If you're in FB look for a preemie website, it will give you some additional support too