Im at the end of my first cycle of clomid. My period was supposed to come today, and it usually starts as soon as I wake up, but theres no blood today. A little cramping, headaches, and breast tenderness, but no blood. I took a pregnancy test yesterday and it was very clearly negative (no matter how much i stared at it.) I did get a positive OPK on the 14th and 15th CD... So why am i not menstruating? Is this to be expected? And when can i take my next round of clomid pills if it doesnt come? Please help