Is it normal to have only 2-3 days menses when one is 40 years old?

Maybe, Maybe Not: Well, it's not abnormal. Like, everyone has their own story. In the absence of other symptoms(pain, nausea, fever, etc) it's probably OK. If you have a short period then another within a short period of time, that's getting at the margins of what might be a "normal" variation. So see how it goes the next 2-3 months and decide if you want to see your gynecologist, especially if new symptoms come up