Hello, I can understand your concern. If the tablet had helped you two years ago for the same problem, then you can take it this time too in the same dose and for the same days described by your doctor previously. However, if the irregular periods are a frequent problem, then you should contact a gynecologist for the physical examination and further investigations as you might be suffering from possible polycystic ovaries, thyroid dysfunction, premature ovarian follicle failure, infection of the uterus/ovaries etc. that may require therapy for correction. I hope this answer helps you. Thank you for choosing HCM. Let me know if you have follow up questions. Best, Dr. Viraj Shah