damn. unless you got a plate number, im going to say its going to go against you.
from what i have always been told, if a car comes in your lane, you only go to the right, never the left. if you cant go right, try to go as far as you can. let them hit you.
if you go into their lane bc they are in yours, then they may notice and correct, then you're the one in their lane and are at fault if you hit them, or the car behind them.