Hello dear
Understand your concern
Following are the causes of delayed period other than pregnancy:
Excessive stress, ovarian dysfunction/PCOS, adenomyosis,
endometriosis,
thyroid dysfunction, change in lifestyle and dietary habit, high prolactin, low progesterone.
Consult the gynecologist for management of your problem after following investigations like full hormonal analysis: Progesterone, FSH, LH, E2, Prolactin, TSH, TT4,TT3.
Ovarian follicle study, USG.
In absence of pregnancy, period can be induce by
norethisterone tablet and can be regularize by using contraceptive pill after proper evaluation.
Do regular stretching and relaxation exercise, healthy diet and fresh fruits.
Hope this may help you
Best regards
Dr. Sagar