Ok, so I am in my fertile window (I think!) I am on CD19 of a slightly irregular cycle. From about 31 to 35 days so I think that would make me likely fertile. I am TTC number 3 and have been using OPKS for the last cycle and this cycle which is cycle 3. Is this a positive as this is the darkest line I’ve ever had so far but then it is similar but not quite as dark as the control line ... is it worth DTD tonight ? Sorry if TMI but we did it last night !