So last month i had a period which was 2 days long, this month it was only 1 day long with brown spotting throughout the next two days. ???

Light periods: The main reason for light periods is a change in hormone levels. Causes for what seems to be a light period can include: implantation bleeding in early pregnancy, thyroid problems, eating disorders, excessive exercise, initial periods for a girl, use of an intrauterine device, oral contraceptives & perimenopause. Any chance of pregnancy? Can take a home pregnancy test. D/w gynecologist.