Ovulation testing woes

Justine

So we've been trying to have a baby for over a year and a half. We went on vacation last may and viola we got pregnant! Unfortunately we miscarried around 8 weeks :/ the last few months I've been diligently tracking my ovulation with no avail. This month I had 13 days with high fertility and then I ran out of strips. I never peaked on the strips. This followed a 3 day weird spotting, heavy spotting period. (Nothing like I've had before) Anyone else ever have anything like this happen, the 13 day streak I mean? Idk if it's me or the strips lol. I'm using clear blue advanced digital ovulation detector. I'm getting really frustrated! All input is appreciated!