Need support/advice/help

I saw similar posts, but I could really use some support. DH and I have been talking about having a baby for so long. I can't wait to start my own family and want it more than anything, but I just started a new position at a new school. I tried hard to time it so that I would give birth in the summer, but 3 months later, still no luck and I am getting really anxious, nervous and depressed. I am afraid that since I am not tenured I might be excessed or not given a favorable position. I love the new school and I am trying very hard to earn my keep, but I wonder how the principal would react if I was to become pregnant my first year at a new position. Any advice?