I Have A Skin Care Question?

I'm 15 and I have medium skin, when I wake up in the morning it's slightly shiny all over, and have many small bumps on my forehead, acne scarring on both cheeks and chin. Visible pores around my nose, and blackheads on my nose and chin. My t-zone is oilier than my cheek area. And I do get monthly breakouts, mainly on my cheeks and forehead area, which are mostly all whiteheads. What kind of skin do I have and what can I use to improve my skin?