Report Abuse. You will get your second period about a 28 days after your first period starts. However, it is common for your first 5 or 6 periods to be irregular, so don't worry if you skip months or only bleed lightly.It is just your body getting used to the changes.Congratulations!ou will get your second period about a 28 days after your first period starts. However, it is common for your first 5 or 6 periods to be irregular, so don't worry if you skip months or only bleed lightly. It is just your body getting used to the changes. Congratulations!