Not sure whats going on, I am only 32. All my life my periods have been like clock work down to the hour every 31 days!! All of a sudden it all changed, for a year now my periods are crazy. One month it'll come after 27 days then the next month 47 days. I never know when it will come. I also used to never cramp, now its pretty bad sometimes doubled over. :(  Is this an age thing? Anyone else had this an have gotten an answer as to the cause?