On bc for abt 3-4 yrs. take everyday. last period was unusually light and short. discharging a lot too. should i worry abt preg? was taking celexa (citalopram).

If you aren't sure: if it was an actual period - take a pregnancy test. 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.