Thanks Kwick. I don't envy you with the Prontogest - it sounds painful 
You're still quite early to be testing as you know so you are still in the running. 3 days before AF is due is the earliest I've had a BFP.
I missed Late's question about who have we told... I told all of my close friends plus my parents and siblings last Spring/Summer once I had made the definite decision to go ahead. My mum said, and I quote 'Oh yes, we wondered when you would do that'! which was fab because it showed they had already thought it through and were supportive. All but one friend was fully supportive, and that friend softened once I was pregnant last time.
I wanted to gauge the level of support I had before I started treatment, because my friends and family are going to be a very important support network once a baby arrives. I also didn't want to be announcing that I was pregnant and then be having to immediately explain how I was pregnant to avoid speculation about me finding a random chap down the pub!
I have been apprehensive about telling some people, like my church-going friends (one is a vicar's wife) as I was worried that they wouldn't respond well as I don't think the bible condones this sort of thing! But they've been fine.
At work, my immediate boss knows but she is also a friend and supportive and trustworthy. I also needed her support in swapping working days etc. One of the HR team knew about the miscarriage but not the method of conception.
Late - I hope you are doing ok 
I've got my fingers crossed so tightly for news of two sets of BFPs this week on this thread 