Milly B - did you only get positive OPK on one day? ie, day 17? This happened to me it was dark as the control line and this was the day I ovulated and concieved.

Going by what I say above you are 14 DPO yesterday, 15 DPO today.. any sign of AF????? or have you done a HPT? Goodluck... best wishes and let us know how you go!

Bel
xxx