Hello I appreciate your concern Irregular periods warrants detailed evaluation This could be due to any of following Hormonal imbalances near menopause DUB (dysfunctional uterine bleeding) Endometriosis Infection like STI or PID I would.like further information to help you better Your age and obstetric history like number of kids are you seeing any discharge per vaginally since you had tubectomy so chances of pregnancy is unlikely please consult a gynaecologist for examination and a a battery of tests like blood to.ascertain a diagnosis maintain good hygiene Avoid smoking and alcohol Have plenty of fruits and fruit juices Avoid fatty fried spicy junk.food and carbonated drinks Hope this answers your question wish you good health regards