Half way through my pill (on Yasmin for the past 7mths) when i got spotting something that hasn't happened before. this went away and 1 week later my period came unexpectedly and irregular...i still hadn't finished my pill for the month. that was 2 and a half weeks ago and im still having this irregular period. could this be caused by stress? cant think of anything else that's different, started having unprotected sex with my partner after being away for 6months would this have anything to do with it?....Confused %-) !!