Hello Thanks for writing to us with your health concern. Yes, you should be investigated for the irregular cycles. Firstly go for a thorough internal examination - per vaginum and per speculum. Then, please go for a pelvic ultrasound scan, this should be done transvaginally and not abdominally. If this was not done, please repeat the sonography. Also, get hormonal levels measured - FSH, LH, TSH, Prolactin, OGTT, DHEAS, free testosterone, Fasting insulin, Lipid Profile. Pregnancy should be reliably excluded by a pregnancy test. Conditions like stress, anxiety, tensions, weight gain, changes in sleep or eating habits, travelling , change in climate or altitude, ingestion of hormonal medications - all these could be other potential reasons. Abnormalities of thyroid hormones and polycystic ovarian syndrome ( PCOS ) - these are two other probable reasons. I think in your case, PCOD is likely to be the most probable diagnosis. Before planning to conceive, it is best to have a workup. When mild hormonal imbalance is present, progesterone drugs when taken for 5 days and then abruptly stopped , will generally succeed in inducing a withdrawal bleed. Please have an evaluation as outlined . All the best. Please feel free to discuss further.