I just blurted it out. I have a very open relationship with my boss and as she knew I had been worrying about TTC due to problems my sister had, she was over the moon for me, grabbed me and gave me a massive hug. I then had to tell the boss above her and he was really lovely and supportive and asked to see the scan pic. I'm on my six weeks holiday now so I don't need anything from them. I worried about getting around college with all the students there, we'll have to see come September. I might have to ask if I can end my lessons early so that I can get through the corridoors when it's quiet.
Hope it goes OK and they are supportive. Like Jojo84 said, ask for the maternity policy! Good luck x