Your symptoms are all over the map. They all fit PCS but at 11 days, you have just started into the process of concussion. It is a process not an event. The trauma causes an injury that causes a cascade of events in your brain. Some take some time to manifest, others show up right away. No two concussions are the same.

Your drinking can intensify the process, especially if you have been getting drunk routinely for the last 25 years. A bad drunk episode is like a mild concussion. They all add up to cause trouble.

Without some information about your job and other daily activities, it is hard to make any comments about your anxiety and such.

Stay away from the alcohol and only one serving of caffeine per day. Caffeine enhances anxiety. Maybe you drinking lessens your anxiety and being stone sober may reduce your tolerance to anxiety. Like caffeine, only one serving of beer or such per day. Not a tall one or a forty, just a single 12 ounce glass of bear or regular glass of wine.

If this concussion lasts, you should consider making some adjustments in your behavior. The over 40 brain has much less tolerance for concussions and getting drunk.