I'm sorry she's being so pushy, she's really over stepping the boundaries isn't she!

I think you need to be very firm with her and tell her that you have all the advice you require, and that she can be there to support you as a mother but not a medical professional. Tell her very firmly that if she crosses the boundary at any time between now and 2020 you'll have her on a plane to Arizona faster than she san say "BUT...".

I understand that it's hard to have these conversations with our parents but it's really essential when you're pregnant that you not be bothered by trivial concerns of other "well meaning" people.

:hugs