My doctor has referred me for 21 day blood tests and an ultrsound as the first step into looking into why I'm not getting pregnant. I asked whether the 21 day test had to be on day 21 and he said no, sometime between when I ovulate and five days later. When I rang up they offered me an appointment this coming Tuesday, day 18, and I took it. I usually get clearblue positive day 15 or 16. Now I have read more about the test it seems I should have made the appointment on day 21, if not later for me, as my cycles are 31-33 days. It is supposed to be 7dpo. Of course I realised this last night and now they will not be open again until Monday or even Tuesday. If they will move the appointment back until Friday then problem solved I think, but if not, should I go anyway? It seems likely the progesterone result will point towards me not ovulating if have it too soon. However the other things they are testing for are probably not influenced so much by the date. Thanks for reading, Asta. I have tried to explain all this to DH and he has been no help!