Malsedge,

You do not have Post Concussion Syndrome. It is when your concussion symptoms persist beyond 6 weeks or more. Right now, you are just needing to recover from a concussion. The delay in symptoms is not uncommon. In fact, it is quite common. Your brain tried to go on like normal until it hit a critical mass of struggles and the concussion symptoms came crashing down.

As luduplo said, you need quiet rest. If you go back to work, you will likely be very symptomatic and be sent home. Don't try to hide your symptoms.

In the mean time, stay away from caffeine, alcohol and artificial sweeteners. They are poison to an injured brain. Check to see if there is a Headway organization nearby. They can be helpful.

Feel free to tell us how you are doing. There is good help here.

My best to you.