What should i do about my pressuring mom?

i dont kno what to do . my mom has gotten really chaotic lately becuase of my sports to the point were she pressures me to be the best. shes gotton so upset with me that after my race i did bad in she pulled me out to the parking lot and slapped me on the face. all day i had red whelps. i tried to get over it but she keeps pressuring me to do good and always tells me im suck and need to get better. all of this has actually made me try suicide once but it didnt work so i havent told anyone. she makes me hate sports now. also later today from bball practice she told me i wasnt commiteded and we got into an argument so almost home while she was driving she turned over and punched me in the face. i have a swollen cheek and a cut on my nose. i dont kno whut to do. she told me this was legal and that to get out of her house if ur gonna tell someone. please someone help.