Sometimes it's so hard to know when it's considered a miss or not... Since I was young before I started to have sex my period was irregular. But then it did change over time, it got more into a regular scedual. Thing is sometimes it's hard to know or tell if my period is considered late if my period is off by two to three or even a week off. This makes it even harder and stresses me out... Which could be the reason why my period doesn't go regular >.> cause of stress any tips?