My period is always on time every month, and has never been irregular from the time of when I turned 14. My period always lasts at least 6 days, and then dies down towards the 6th/7th...I got my period this Friday morning, and it is now tuesday, and its basically gone!? this has never happened to me before...whats wrong with me? I been having sex regularly with myboyfriend unprotected? could that alter it?