I am 26 years old.My Periods too have always been irregular. My cycle lasts anywhere from 40 to 60 days.During a year, they can be regular for a few months and then I would belive that I have finally been cured. But, the very next month they would go haywire again. I have been to two different gynaec for this problem. They gave me heavy hormone pills that would that would aggravate my problem of diarrohea. Even after 6 months of hormone therapy, my hormone levels were stillupside down and so my periods were still irregular. The doctor advised me to do "breathing exercises" and try to relax. It seemed to me like she was at her wits' end. So, I stopped going to her after that. I needed a break from the medicines anyways.I have noticed that in months when my IBS symptoms are more, my periods are thrown off schedule. I have started taking care of what I eat and try to have only home-cooked food (though it is not possible all the time.) . I have to miss several outings with my friends because of these lifestyle choices that I have made.I exercise about 3-4 days a week. I have started meditating to reduce stress levels. ( I have a tendency to worry a lot ).Its been a year since I made all these lifestyle changes. Still my periods are as irregular as ever.I start worrying about how this will affect my ability to get pregnant because I am going to marry next year. Then, I remind myself that worrying about this problem only makes it worse.