I’m 13 years old and my period only last one hour , And then comes back and last an hour again

Experiencing irregularities with your period, especially at a young age, can be concerning, but it's quite common for menstrual cycles to be irregular during the first few years after you start menstruating. Here's some advice for you:

Stay Calm: Irregular periods are normal during adolescence. Try not to worry too much, as stress can sometimes exacerbate the issue.
Keep Track: Start keeping a menstrual calendar or use a period-tracking app to monitor your periods. This can help you notice any patterns or irregularities and provide useful information if you need to see a doctor.
Consult a Healthcare Provider: It's a good idea to talk to your parents or guardians about your period irregularities and see a healthcare provider. They can provide you with personalized advice and ensure there are no underlying health concerns.
Maintain a Healthy Lifestyle: Eating a balanced diet, staying hydrated, getting regular exercise, and managing stress levels can all contribute to a healthier menstrual cycle.
Be Patient: Remember that your body is still adjusting to hormonal changes, and it may take some time for your periods to become more regular. In many cases, irregularities resolve on their own as you get older.
Educate Yourself: Learn about menstrual health and normal menstrual cycles. Understanding what's happening in your body can help alleviate some of the anxiety surrounding irregular periods.
Seek Support: If you're feeling anxious or confused about your period, don't hesitate to reach out to a trusted adult, such as a parent, guardian, teacher, or school nurse, for support and guidance.
By taking these steps, you can better manage your irregular periods and ensure your overall health and well-being.

It's normal for menstrual cycles to vary, especially during the first few years after starting your period. Irregularities in the cycle, including changes in duration and flow, are common as your body adjusts to hormonal changes.

However, if your period only lasts for an hour, stops, and then starts again later for another hour, it may be a sign of a hormonal imbalance or other underlying health issue. In such cases, it's a good idea to seek medical advice to determine if there's an underlying issue that needs attention.

Talking to a healthcare provider can help you understand what's happening with your cycle and whether any further evaluation or treatment is necessary. They can also provide guidance on what to expect and how to manage your menstrual cycle as it continues to change over time.

It depends on your hormones but in your case its normal
Some girls bleed for 2 days and some girls bleed for 1 week straight
But if you feel something is off please go to your doctor and check your self up
You can get some advice from your mother and your friends to lessen your worries