A week off from school will be worthless unless when you return to school, you can take it slow. I don't think you have such an opportunity.

You need to stay away from bright noisy places. An hour long class would be too much if it is lecture and other verbal instruction. You probably can tolerate 10 to 20 minutes of lecture at the most. The many voices in a lab class would also be problematic.

There is no such thing as toughing it out with concussion recovery. The brain does not heal like a muscle or bone. It needs rest. Sleep is not the only rest. Simple cognitive activities will keep blood flow stimulated without straining your brain.

What courses are you taking that cause the most work-load ?

Maybe you need to drop some classes and take them later. Classes with a lot of memorization or intense multi-step mental processing would be best taken after you have recovered substantially. It took me a year to return to full academic performance when I was a sophomore. I ended up with a lot of B's when I had straight A's as a freshman.

Plain and simple, your brain needs rest.