EVER SINCE JANUARY I HAVE BEEN LOOSING AND GAINING WEIGHT ON AND OFF ONE WEEK MY CLOTHES ARE FALLING OFF AND THE NEXT MY CLOTHES FIT AGAIN.

MY PERIOD ONLY CAME FOR A DAY THIS PAST MONTH AND THE MONTH BEFORE IT WAS JUST SPOTS.

WHAT COULD IT BE???

if ur still losing weight then i dont think ur pregnant. Cause when u are, all that is happening is gaining... u can't help it! But girl, u might wanna go to the doc just to make sure and get that checked out!

I wouldnt put it down to pregnancy because you would be gaining weight.
You missing periods i would say has got to do with the weight ups and downs

If you have been under alot of stress it can cause your weight to fluxuate and then it can cause your period to get messed up. Alot of girls who are anorexic end up stopping their periods completely because their bodies are not getting what they need.....so if you are not preg and you are under stress and maybe not eating vey healthy go talk to a doctor and investigate this further let us know how your doing.......Meg

well you could always do the safe thing and go to the doctor.. but alot of teenagers loose and gain weight at strange times. ( i know i did) i know when i was pregnant i was gaining weight normaly and when they put me on bedrest i accually lost weight. hope this helps.

I disagree with momma, you CAN lose weight when you first get pregnant. Although it is more common to gain it. I do agree that whatever is causing your periods to mess up is linked with your weight. Take a test if you think you might me pregnant, and/or go see a doctor...