Okay, so I think my cycles are usually around 28-30 days, last month it was 25 days. I'm currently on CD35 with no period yet. I've taken 2 HPTs this week, one on Monday & the other Tuesday morning both came out negative. I've been feeling nauseous on and off for about a week & I've been experincing some crampimg which keeps making me think that my period is coming but it still hasn't.  When should I test again? I don't think my period has ever been this late.