Hi my name is apollonia.. i haven't been on my period since october 27 ,2010.. it is now february 1 ,2010.. i have had 2 blood tests done and 1 urine test al in the month of january all of the tests came back negative.. i have been sleeping a little more than u usually do.. i have had constant diahrrea.. lower abdominal pain.. soome slight cramping but still no period.. my breast are a whole cup size bigger than they were before.. i have gained about 15 pounds since november.. i don't know what's wrong..

You might have PCOS, I had the same problem as you, and I didn't have a period for 7 months, when I found out I got PCOS they put me on the pill to regulate my period.

Go to your doctor and ask about it :)