Why am i soo hungry today?

I'm 13, and people consider me athletic. I do golf, and karate whenever i have time, then there's p.e. at school and all. Today i'm SOOO freakin hungry!!! Could there be a reason why? Yesterday i had golf for about 4 hours, and i only ate a danish in between those times and had dinner around 8 or later. For breakfast today, i ate half a bagel with cream cheese, a pint or more of oj. Then around 2, i ate two servings of ramen noodles with 2 eggs, some meat, and other fixingd. I haven't eaten anything else today. And i'm STARVING!!! I was going to wait for dinner with my family, but i'm really hungry!! Is it because i'm getting a high metabolism or growth spurt or whaatt? This hasn't happened to me for awhile now. Btw, i'm 5'2 (a bit more) and 129-132 pounds. Depends. Water/muscle weight i guess.