Help please

Hi, I am 15 years old, 167 cm tall and 64-65 kg! I do sports (running, weight lifting) almost every day for an hour or so, and try to eat healthy, but sometimes i break down and eat cookies or have days that i eat too much on. i used to weigh 56 six months ago, and i find it very hard to lose it again. i am overseas now, and don't know which doctor to go to, so i ask for your help, i really need to lose weight!! thank you