Apart from pregnancy, there are many other reasons for a delayed period
. The other causes are hormonal imbalance like in PCOS (Polycystic ovarian syndrome), stress, obesity, malnutrition, anemia, hypothyroidism, illness, etc. Seek a gynaecologist immediately who will take a careful medical history ,a physical examination, including a pelvic examination. . Blood tests may be ordered to examine the levels of ovarian, pituitary, and thyroid hormones.