Matt,

I agree with rmschaver. Your doctor is not taking care of you. He is trying to dope you up. I would never let a doctor use a shotgun approach of throwing so many meds at a condition that he has yet to properly diagnose. As you said, a CT will always come up negative for a simple concussion. If it was positive, you would have had a stay in the hospital.

Can you get a second opinion? You need it.

If it was my choice, I would stop all of the meds except maybe the escitalopram. It overlaps with all the others.
I would also get started on a brain nutrition regimen. Your brain is injured and needs help to get its chemistry corrected.

I have a post of my recommended supplements in Patty's thread "Hello, New Here." Scroll down a bit.

As rmschaver said, avoid caffeine, alcohol, artificial sweeteners, etc. You also need quiet rest. Limit cognitive effort and sensory stimulation such as loud music, multiple voices, flashing lights, visual clutter, etc.

You want just enough cognitive stimulation to keep your blood flowing through your brain, no more.

Let us know what the doctors say when you ask for a 2nd opinion.

My best to you.