No one was judging you OP 
Raising a concern doesn't mean a judgement, it just means there could be a potential concern really, they need to establish if there is anything to worry about. So in my notes, I might note something and think I'll just investigate it. Then you would have to log whatever it is I was investigating. Then after investigating I might think "actually I can clearly see this is happening" or "this is slightly concerning but I can see there are mitigating circumstances so I'll keep an eye" or "there is a concern I will follow it forwards" after monitoring they clearly didn't think anything was wrong as they didn't take it further. They shouldn't have spoken to you before they established if there actually was anything to worry about!
Medical notes have to be factual, it will just document the facts from what the hospital see. You have to make sure you document everything basically, because if something did turn out to be a problem you've got it there.
No one is going to read those notes and think you were a bad mother. Anyone who does read those notes will be a)directly involved in your babies care and b) read very similar notes all day everyday. To be perfectly honest whoever wrote your notes probably writes fairly similar on all of the notes.
For example a person above said on their notes "patient asked appropriate questions" I might put something like this is my notes to show that there was no concern in this area, and I will put it in all my notes unless there was a concern. It's about showing that I've thought about everything. I will always make a comment on certain things in my notes to show I've considered them but ts not a judgement it's just part of offering full care to the patient.
Its about building a picture, a few of the things you've mentioned might be a concern if other things were present, it doesnt mean that you were doing something wrong. All it means is that for example if you were quiet and not asking about feeds, and then also stopped coming they would be able to look at all three together. So you would document them and then if a few other things come along you've got a good picture of the situation. But if you don't put the first things, which on their own aren't a concern you can't see the bigger picture if furthers things come along down the line.
Honestly OP, no one will have judged you. You are doing a wonderful job, it is hard when you have a baby in NICU and that's without adding other children into the mix. You did your absolute best for both your children and that's all you can do.