A few months ago you had pneumonia and lost a lot of weight think have one period since is there something wrong?

If you have not had a period since your pneumonia and weight loss, it is important to see a doctor to rule out any underlying medical conditions.

There are several possible reasons why you may not have had a period since your pneumonia and weight loss. These include:

- Pregnancy: If you are sexually active, it is possible that you could be pregnant. A pregnancy test can rule this out.

- Hypothalamic amenorrhea: This is a condition in which the hypothalamus, a part of the brain that controls the menstrual cycle, stops functioning properly. Hypothalamic amenorrhea can be caused by a variety of factors, including stress, weight loss, and certain medical conditions.

- Polycystic ovary syndrome (PCOS): This is a hormonal disorder that can affect women of all ages. PCOS can cause a variety of symptoms, including irregular periods, weight gain, acne, and hirsutism (excessive hair growth).

- Menopause: If you are over the age of 45, it is possible that you are entering menopause. Menopause is the natural process by which a woman's menstrual cycle ends.

It is important to see a doctor to determine the cause of your missed periods. Treatment will depend on the underlying cause.