My periods are usually only 3 days: heavy day 1-2, tapers off by 3 then done. My cycle is also only about 26 days. Last month, I had a normal flow pd but it was 10 days early. This month I was 2-3 days late, it lasted 7 full days. I'm 44, use no BC and have 5 kids ages 21-4 if that's helpful.