I am 41 and since I was 13 I've had a perfect 28 day cycle. There's been literally only a handful of times where I've been a maximum of 24 hours late on - including of course when I was pregnant with my daughter. My husband and I are trying to conceive again and I took an ovulation test. I ovulated day 14 as usual. I should've got my period well over 48 hours ago. I tested yesterday and it said I'm not pregnant and I was utterly shocked because I have literally never in all these years been this late other than when pregnant. Never. What on earth could be wrong? Can anyone help please - I can't think about anything else!