Thank you! I have my yearly physical on Feb 1.........that will be helpful as well!
There could be a few things or absolutely nothing. Hormonal imbalance, stress (both good and bad), diet, sleep habits, weight gain/loss, or you could just not ovulate one month. It happens to just about every female in their lifetime. It's also possible you're getting close to perimenopause, and in that time frame your cycles usually will become irregular. Hormone testing can confirm if that's the case for you.