@spiderman2 , paragraphs man, paragraphs
It seems (to me) that you're seriously overthinking this whole ordeal with her. Take a breath and don't overthink the situation.
Based on what you've said here, I'd think this girl isn't the right one for you. Her child is going to be a big part of her life for some 16-18 years (before independence). If children or babies scare you, honestly, what are you thinking when you're considering getting involved?
Edit: You've stated that you've never had a relationship and you work with people that're primarily vastly differently aged from you.
Along comes this young girl who (presumably) shows you a little interest - maybe something you've not had in some time - and now you're smitten with her.
Tread carefully, that's all I'm saying for now.