You might find that your next period makes a surprise appearance any time. It's early for menopause but not early for perimenopause, and one of the things the body can do then is not ovulate every single month.
Ovulation triggers the next period, not the other way around, so it would stand to reason that no period means you haven't ovulated this past three months. This can also happen with stress, having nothing to do with menopause. Young women who are really thin (like with anorexia) can have it happen too, as well as women who have a super low amount of body fat because they are athletes.
If your period is a no-show for, say, six months, you might get a checkup from your ob/gyn and see what's happening with your hormone levels.