Help im really freaked out?

ok me and my brother (same age) got in a fight. we were sitting in my room and we started arguing (his fault) and i told him to get out and he wouldn't so we got in a even bigger fight and i forced him out and we flipped each other off and he went and got our mom (he dosent live with me so we sleep in the same room hence he dosent have a bedroom here) and me and him and her got in a big argument and she sided with him even tho he started it :( so finally she went and made him a bed in our sunroom and while she was in my bathroom getting blankets he came in my room and i told him to get out and he didnt so i went over to shove him out and he lashed out and punched me in the gut so i punched him in the gut and he tried to kick me but i kicked him in the balls and i told my mom he punched me and she said she would to :'(. this is the most pissed iv seen him and im scared if i go to sleep tonight he will kill me :( please help im scared to go to sleep