What are some possible things that could make your period late without being pregnant?

1. Stress: Chronic stress can disrupt the balance of hormones in your body, including the hormones that regulate menstruation. This can cause your period to be late or even stop altogether.

2. Weight loss or gain: Sudden changes in weight, either losing or gaining a significant amount of weight, can affect your menstrual cycle. This is because weight loss or gain can disrupt the production of estrogen and progesterone, which are the hormones that control menstruation.

3. Thyroid issues: An underactive thyroid (hypothyroidism) can cause a number of health problems, including irregular menstruation. This is because the thyroid gland produces hormones that are involved in the regulation of metabolism, and when these hormones are out of balance, it can disrupt the menstrual cycle.

4. Polycystic ovary syndrome (PCOS): PCOS is a hormonal disorder that affects women of reproductive age. It is caused by an imbalance of hormones, including estrogen, progesterone, and testosterone. PCOS can cause a number of symptoms, including irregular menstruation, weight gain, acne, and excessive hair growth.

5. Perimenopause: Perimenopause is the transitional phase before menopause, when a woman's ovaries begin to produce less estrogen and progesterone. This can cause a number of changes in the menstrual cycle, including irregular periods, heavier or lighter bleeding, and longer or shorter cycles.

6. Medications: Certain medications, such as birth control pills, antidepressants, and antipsychotics, can affect your menstrual cycle. This is because these medications can alter the levels of hormones in your body, which can disrupt the menstrual cycle.

7. Medical conditions: Certain medical conditions, such as diabetes, cancer, and uterine fibroids, can cause irregular menstruation. This is because these conditions can affect the production of hormones or the structure of the uterus, which can disrupt the menstrual cycle.