need help Please

[engbulldog]

Well a short intro first: lat summer while racing my motorcross bike i fell like a dumbass and my knee went 10 diffrent ways the next day went to the doctor and afetr sitting there for 45 mins 5 xrays later he said all i did was twist it .Now at work Fri just got done playing ping/pong started wo walk and the next thing i know is a sharp pian in my left knee it didnt swell up but i can't put any pressure on my leg.Went to the doc on sat this dipshit said i tore my acl but he wasnt for sure,now do i let the swelling go down due to the doctor twisting the shit out of my knee and keep on training or do i opt for surgery? note just started a cycle and the rest of my shit is on its way