I'm so surprised how sensitive my body is! If I'm on any kind of antibiotic, I won't ovulate until I'm done taking it - goes from a 30 day regular cycle to a 41 day cycle. Also, I went on two overnight flights (left on the day I was meant to ovulate and even had ovulation pains) and didn't ovulate until 5 days later when my sleeping schedule was back to normal making this a 39 day cycle. What do our sensitive bodies mean?