Could irregular periods cause depression and what should i do about it?

Unlikely: Likely there is a third agent working to cause both depression and irregular periods. How long have you had your period? Have you seen a doctor? Can you talk to other women in your family about how they were at your age? Frequently, the way your body works closely maps to how mom, sisters have experienced their development. The periods may be a family thing! talking is most important. Be well.