If you don’t have your period at 13, you don’t have it because you are not fully developed and your ovaries are not ovulating yet. The average age of first menstruation is between 13-15 years old. Having leukorrhea is also a symptom of an approaching menstruation. You can actively observe and pay attention to local hygiene to avoid infection. Usually eat more nutritious things, eat more pigeon eggs, tofu, dairy products, fish and other nutritious things, should be coming to menarche soon. In the process, you should also relax, strengthen exercise appropriately, and don’t be too nervous.