Staying Out of the Workforce

General career advice would be greatly appreciated, although I know that most of this is outside anyone's power to really know for sure -

I am a former teacher who went back to grad school to get my MSLIS. I taught in a school library for a year while finishing up my degree, although I had to leave early due to pregnancy complications. Since my child has been born (almost a year ago), I've been staying at home with him. I'd love to stay at home with him longer, but only if I can be sure it won't destroy my future career. I am worried that I won't be able to get back into the paid workforce if I stay out too long. I also am unsure if I want to go back to school librarianship or switch over to public librarianship, which adds another layer of worry - for example, what if I try public librarianship, don't like it, and want to go back to school; how will I be able to land a job when I was out of the paid workforce for three years and then in public libraries? This assumes I could even get a job in public librarianship after working in schools my whole life then taking a time out to raise my child.

I know that no one can say, "Sure, stay at home, you'll definitely get a job when your kid starts school!", but does anyone have an idea of how much being a stay at home parent could hurt me? Has anyone been in a similar position? Has anyone hired a librarian that was out of the paid workforce for awhile? Is there anything I can do to make myself marketable during this inbetween time? I am a part of professional organizations and listservs, stay involved in the children's and young adult literature scene, try to stay up to date with what's happening in the library and information science field, and take webinars occasionally.

Thanks in advance!