Normally I have periods that last 6-7 days. And my cycles are typically 25-26 days long. This time my period came 2 days early and it seems to me that it only lasted 4 days (today is the 4th day and I only need a panty liner). So my question is, is it normal for my period to sunddenly get shorter? This is my second month off BC pills. And also, how do you determine the actual last day of your period? Thank you!