Technically speaking, not seeing a period for so long indicates attainment of menopause
but it so happens many-a-time that one can see a period even after one year. Though this can be deemed to be natural before the function dies off, it is as a precaution that around this age you should get a regular checkup once every six months. A pap smear
along with a pelvic/trans-vaginal sonogram should accompany, at least once-a-year. Please see a gynecologist for further management. Wish you good health.