Sounds to me like you have a severe case of hypochondria. Plus, you drink too much. Fortunately, alcohol in the system during a head injury has a slight neuro-protective effect. But, not enough to justify drinking and driving. I know too many brain injured people whose injury is the result of an auto accident involving alcohol.

Go to the ER and then report yourself to the police. Then they will be sure to give you an incentive to not drink and drive. I don't know which has a worse penalty, DUI causing an injury or leaving the scene of an injury accident.

And, if you are going to get drunk and do dumb things, you should get some insurance.