They say some months you don't ovulate. If you don't ovulate that month how to you know when you are going to get your next period? I am on Day 20 and my temp has not risen yet, but yeasterday I did have milky CM. I usually don't ovulated this late, that's why I was just wondering if I was not going to ovulate this month. Question if you don't ovulate during the month would you have CM during that month? Thanks