Should I say something?

I would definitely continue to help her, it sounds like she needs it. Not sure if she is depressed, sleep-deprived, or both, but it's great that you are there for her and her baby. You sound like a good friend. Depending on how (or if) you approach it, and how she reacts, things might change. I wouldn't want the way you approach her to cause her to push you and your help away. I think you being there and asking her those questions (has she been changed, does she need a bottle, etc) might get her to see that those things are important and that her baby does need to have those things taken care of. Whatever you decide to do, best of luck & take care!