Negative pregnancy test but light period?

Mentral periods: Periods vary from 3 to 5 days, light and heavy. This is normal and depends on your health and activity level. However, if you had sex and are worried, make sure you did your pregnancy test correctly as per the instructions and repeat it a week later to double check the accuracy. If no sex, then no way pregnant. If not pregnant, do nothing about the light period.

Light period: The main reason for light periods is change in hormone levels. Causes for what seems to be a light period can include: thyroid problems, eating disorders, excessive exercise, initial periods for a girl, use of an intrauterine device, oral contraceptives, perimenopause & implantation bleeding in early pregnancy which rarely occurs.