Originally Posted by micoko
check the hormonal balance!! it could be this, especially if u're a woman. Also make the mood diary- every day mark how you feel. If you notice that is happens from 20th cycle day, you may have a premenstrual dysphoric disorder (PMDD), which is severe PMS form and and could cause huge mood changes.
I started my period just today, actually. And I get 'em like once every few months lol So I never bothered keeping a track. Do you think that has anything to do with it?