Okay well my period is a week late, it has always been regular.
I have not been sexually active recently, the last time was the very begining of september (2nd or 3rd) and i got my period that month, and in october and it was regular as always.
I haven't had a change in diet or been more or less active than usual, i'm not or have not been under any stress at all..
Since you said it couldn't be caused by stress, diet, or activity, it's most likely that your hormones are just playing tricks on you. It happens, or will happen, to every woman. You can't fix it on your own, though. Irregular periods are normal. It's your hormones' job to fix it, and get it regular again. However, if it keeps doing this for months, or off-and-on, contact your Doctor to see if a check-up and/or medication is needed.
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.