I also think you should go for it. I was 42 when I STARTED in nursing school
and am now 45 and 6 months off my orientation. I'm a little worn out at times, but successful so far.
I will say, in reality, as a mom, nursing on a typical floor 3 days per week can wear you out. If you have wee little ones, I'd say take it slow, do school, then maybe start out part time. You still have TONS of time to advance your career once your kids are in school. I have found that on a floor, they all of a sudden want you to join this or that committee and it translates to more days off coming in to do extra stuff. All part of being a staff member -- just time consuming. My youngest is in school all day, so I can swing it, but it's still time away from housework, errands, etc.
Anyway, you're YOUNG still and we need nurses so much that age discrimination is very minimal, if non-existant, especially if you are smart and hardworking and can adapt to the whole nursing culture ok.