Charlie74 - I had the really bad lower back pain at 12dpo which was unusual for me and that night I slept badly and had restless legs all night. The next day the back pain was gone. Yesterday I felt a bit nauseous but in other pregnancies I have never got that til 5 or 6 weeks so I thought it might just be progesterone related. I guess the planets aligned and it worked. I still can't believe it.