it very well could be stress. i highly doubt that you are pregnant. try taking some you time. hang out with your fav buddys, take a nice hot bubble bath by candle light (if you've never tried it you should....very relaxing) go swimming, walking , running, or what ever physical activity that you enjoy (for me i find yoga a very good workout that calms the body as well) have some one give you a massage...etc.....what ever relaxes you....i always make sure i do this at least once a week (i find that trying to have me time anymore that that adds stress instead of reducing it) try this for a bit and your periods should come back. but i would also suggest going to the doc and making sure you dont have any underlining problems...if you dont than just relax some.
hope this helps
liz
thank you i will try tht and let u know
Have you had any drastic weight loss lately?
That can slowly stop your period.
Exercising to much can also, and if you gain excessive amounts of weight at once.
If your underweight, this can also stop your period.