BW - Have no advice for you for IVF but I am a teacher and kow what you mean about having extra pressure with hormones and pg and who you can trust with info. It would be good if you could confide in your HOD at least and just tell you principal it's private. I had to tell my principal very early on in our pg as I had hideous ms and then extra complications and although I don't think my principal handled things very well my deputy was so supportive and helpful (and suprisingly male).

Is there any chance you could take some leave somewhere along the time to help you out?