What does it mean if you have a really short period?

You're lucky!: There is every imaginable type of period when it comes to duration, amount, and frequency. If you have a short period, be happy! most women in their 40s have "the storm before the quiet" of menopause with heavy/long periods. This could be heralding your entry into menopause, so watch out for other changes like depression, hot flashes, and sweats.