Well I thought I'd give the clearblue digi opk a go today, just to see if I am ovulating and hopefully when. Not planning to start ttc until Dec but I just wanted to have a go as part of establishing my natural cycle and all that. I am planning on doing it at lunchtime from home. I've only had the one 'normal' cycle since coming off the pill which was a 28 dayer. The instructions say to start CD 11 and I have 7 sticks so that will take me through to CD 18. Anybody else planning on trying this at some point, or maybe you already have? I wonder what will happen!