Is it normal period twice in a month?

This can happen sometimes. It is not always a bad sign. Some people just have shorter cycles. For example, if your cycle is 21 days, you can get a period at the start of the month and another at the end. That is normal for them. A lot of things can change your period too. Like big stress, travel, or changing how you eat or exercise.

But if this is a new thing for you, or it keeps happening for a few months, it is a good idea to talk to a doctor. They can check if everything is okay. Sometimes it's a hormone thing. It is good to check to be safe, you know?