What do I do if I was in an accident and unknowingly gave incorrect information to a police officer?

I was in a car accident. The car rolled over 3 times but we all had our seat belts on. My body slammed into the person next to me and I had severe shoulder pain and apparent head pain the next morning. Was in state of shock after accident. May have had minor concussion. I told a police officer the driver was someone who wasn't driving because at the time that's what my friends told me. The person who was driving didn't have his license. I had no idea what was going on so I told the police officer the wrong thing by accident as well as the hospital people. The next day my friends told me the truth and didn't confess until a few days later without telling me. The cops then called me and I once again mistakingly told a police officer false information, but then corrected myself roughly 10 seconds later when he told me the two people confessed. I am being charged with a 268/13B/A and am in need of help because I'm pretty sure my story makes me not guilty.