Hello, misst20. Thank you for posting.
There can sometimes be a longer period of time between the first and second period for some girls. Generally, a teen's body is influenced by its growth and therefore can start and stop the menstrual cycle while it's growing. In the next few years, you might experience a delay or even miss a period. A lighter or heavier flow some months. As you grow and mature your periods will become more regular. This is the case for most women, though not all.