Hey, so my period is four days late. I'm 16 and have never been involved with a guy in any way. Also, I reached menarche (my first period) when I was 10 (uh god, so early) and it's been 6 years. The only time I have ever skipped a cycle was when I was 10 and that was around five months after I first got it. Recently my parents have really been bombarding me with college talk but theyve been doing this ever since high school started and in the past year my periods have been regular. and i have the ACTs this saturday, but I dont feel mentally stressed and I'm usually pretty relaxed. My period has never been this late. What could possibly be wrong?