womens cycles can vary. it all depends on your specific body chemistry and hormone levels. if it worries you that much, i would advise going to your dr and asking for fertility testing to make sure. on that note, have you tried getting pregnant? your period isnt necessarily a fertility indicator, i have a girlfriend that has an absolutely normal cycle and had to undergo fertility treatments because she was having such a hard time conceiving. then i have another friend that has abnormal cycles and conceived quickly.