My period is currently 11 days late. I have taken 2 pregnancy test both have been negative one was in the afternoon the other was yesterday morning. I have been emotional crying at small things and tired for about a week now, I want or feel like I need to take a nap. My Cycle is between 28-31 days for the past 3 months it has been a 28 day cycle. Could this late period be a sign of something else? I am 34 years old. I started my period at the age of 8 could I be trying to start the change of life? Should I wait a take another test?