TMQ,

It sounds to me like depression. Depression can be caused by dealing with the concussion.

I suggest you get a professional's opinion.

I understand the frustration and despair this can cause. I have been through these feeling and thoughts many times in the past.

It has no relation to your personal strength or will. It is the result of a bio-chemical reaction in your brain. It also does not relate to whether you are enjoying your days. It has more to do with the struggles your brain is under as you try to recover.

btw, You good times with friends could be too much for your brain in its current condition. Just because it is enjoyable times does not mean it is not exhausting to your brain.

I usually will suffer this set back the day after a busy and enjoyable day.

Please, if this continues, get some professional help. You will be glad to did.

My best to you.