My periods are usually 4-5 days long but for the past few months they only 1 a half regular and i am not pregnant should be worried?

If you are not pregnant and have experienced a sudden change in your menstrual cycle, it is advisable to consult a doctor to determine the cause. While occasional variations in menstrual cycle length are normal, a significant change or irregularity may indicate an underlying health issue.

Here are some possible reasons why your period might only be lasting 1 to 1.5 days:

1. Hormonal Imbalance: Fluctuations in hormone levels can affect the duration and regularity of your period. Conditions such as polycystic ovary syndrome (PCOS), thyroid problems, or early menopause can cause hormonal imbalances.

2. Stress: Chronic stress can disrupt the normal functioning of the hypothalamic-pituitary-ovarian axis, which regulates the menstrual cycle. Stress can lead to irregular periods or shorter durations.

3. Infection: Pelvic infections or sexually transmitted infections (STIs) can cause changes in menstrual bleeding patterns, including shorter periods.

4. Medications: Certain medications, such as birth control pills, emergency contraceptive pills, and some other hormonal treatments, can affect menstrual cycle regularity and duration.

5. Pregnancy Loss: If you experienced a recent pregnancy loss, such as a miscarriage or ectopic pregnancy, it can disrupt your menstrual cycle and cause irregular bleeding.

6. Perimenopause: As women approach menopause, their menstrual cycles can become irregular and shorter in duration. This transition period can last several years and is marked by hormonal changes.

7. Uterine Abnormalities: Structural abnormalities in the uterus, such as uterine polyps, fibroids, or adenomyosis, can affect the menstrual cycle and lead to shorter periods.

It is important to consult a doctor for an accurate diagnosis and to rule out any underlying health conditions. The doctor may recommend tests such as blood work, pelvic exams, or imaging studies to determine the cause of the change in your menstrual cycle. Based on the findings, appropriate treatment or management options can be discussed.