drod,

Welcome to NeuroTalk.

You experience is very common. The drinking is a common PCS problem. The concussed brain is very sensitive to alcohol and the toxins in alcohol.

You should consider making two changes in your life.
First, no alcohol for a few moths. When you are feeling better, one serving per day may be tolerable. Avoid all alcohol if having a single drink leaves you with a hung-over feeling. This is highly likely to happen.
Second, You need to stop any contact sports or other risks of impacts to your head. You may be more tolerant after a year or two.

There are more things for you to consider but this will be a good start. Others will likely tell you about their experiences.

When you are symptomatic, you need quiet rest. B vitamins will also be good.

So, take it easy and learn to live a more disciplined life. Your brain will thank you.

My best to you.