ProAgonist, I agree with Mark.

When I look back on my life at blows that caused a concussion and those that didn't, there are huge differences. My last concussive blow caused a giant purple goose-egg that was swollen for days and tender to the touch and even so this concussion has been mild. I also saw stars and couldn't open my eyes for a fair bit.

I've been hit on the head many times before that - including having branches fall on my head. At most I've felt weird for a day, but it has always passed. And yes that included headaches and fogginess.

I agree with Mark that you need to seek help for your anxiety. During my first major concussion I was probably just as anxious as you and it hurt rather than helped me. I saw significant healing once I put my worries aside and allowed myself to rest.