Irregular period?

Hannah • Just on here tracking my period and praying I don`t get pregnant.
So I've had my period for 4 years, since I was 11. I'm now 15. I know it takes around 3 years to become regular, and I just recently started having sex. But I'm getting tired of my period being irregular, is there anything I can do to help regulate it? Last period I had was in the middle of November. And it's almost January.