AJ, i can see your dilemma.

I told my boss at 5 wks with my first child. Only because i was doing x-rays and anaesthetics all the time and heavy lifting, so it wasnt in my best interest not to tell her. I had a good repore with my boss to so i actually think that made it harder for me to tell her. IYKWIM.

My boss was also hopeless at being organised as far as staff went to. That was another reason i told her. 9 months doesnt take long at all to come around and if your position is pretty full on its going to probably take that amount of time to teach someone else. Follow me.

It might actually be a big relief once you have told them. Dont stress though, thats the last thing you need now at this crucial time.

Good luck with your decision