hi this could be to a number of reasons. stress and a change in diet can cause late periods. other factors are age could this be the start of the menopause? i would try not to worry to much as your thyroid and hormone levels are at the norm base line. if you are still worried perhaps ask to see a gynaecologist to put your mind at ease.
the first day of my last period was 10/31/13 and still no period and took preg test t was negative. what does this mean? . i was also on the pill but have never missed a period or been late till now. i went to the doctors and all my labs came back normal. my thyroid and my hormone levels all normal. i had a ultrasound and it was normal as well. i had no period in november and so far nothing for dec. i'm no longer on the pill i stopped it for this month. i was supposed to start my period the week of nov. 25th but nothing and i went to the doctors on december 2 2013. today is december 17 and still no period.