Why periods cone twice

What are the ways to treat irregular menstruation?
If you suffer from irregularity in your menstrual cycle you should visit a gynecologist, who can be prescribed drugs such as Cycloprogynova to regulate the cycle, while making sure to exercise on a daily basis and is available from various nutrients such as proteins and vitamins.
In cases of polycystic ovaries, cycle therapies such as Clomid to stimulate ovulation are prescribed periodically with a specialist gynecologist. In other cases, it is the result of thyroid laziness.
What are the required medical tests ?
 An examination of the hormones FSH, LH is performed on the third day of the menstrual cycle, and US of the abdomen to diagnose conditions such as cysts and examination. 
What are the causes of irregular menstrual cycle?

1. fibroma.
2. obesity.
3. Polycystic ovaries.
4. Thyroid laziness.
5. milk stomach.
6. Endometrial hyperplasia.
7. L womb.
8. hormonal disorders
9. The copper IUD.

Advice for now:
I advise you to have a medical examination with a gynecologist.