are menstrual cycles supposed to change?

Lisa

New member
My period has always been irregular since i first started,and its always lasted up to six days and on the 7th day it would be gone.For the last month it started to only go three days and stop on the fourth day.Now though its going back to a week.Is that normal?
I haven't hung out with any friends for about 3 months.and no female in my house goes for 4 days.
 
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