I need help with my anger?

i have a serious problem with my anger and wen i say bad i mean bad i had a gf and she did something i didnt like then i flipped out my mum said to go to my room and calm dwn so i did im only 15 and cnt control wat ive gt i even become mre stronger and faster wen im angry i have tried getting help bt i have hd no luck so where or wat cn i do to help myself. i dnt wnt to hurt the ones i love