Bun I decided to change it yesterday as when I put in my temp, FF took away my coverline but I know I did O, so as soon as I changed it, everything looked normal.
BekZ I don't actually O until around CD 18-21 (last 3 cycles have been on day 21) and I don't want to wear DH out too soon so we will be waiting about 12 days before we start BD fest.

I must say though that now my new cycle has started I am feeling a little scared about getting pg again and then losing it.