Pretty common problem. If it persists, it's something worth mentioning to your OB/GYN. A lot of them are more sympathetic to periods triggering IBS and are willing to work with you on symptom relief, whether it be more natural or using birth control to help regulate and decrease the intensity of cycles.Just warning you that if you mention "adrenal fatigue" to your doctor, they may look at you oddly. It's not recognized as a clinical diagnosis at this point and I'd hate for you to get labelled as a hypochondriac....Many doctors think that IBS patients are obsessive in the first place, and unfortunately I've met far too many of them who are not receptive to IBS patient worries. Best wishes!