Elavil at 10 mgs is a very low dose. The withdrawal problems should be minimal.

Waiting for your CT has no value as the CT will not have any value unless you have symptoms beyond those of PCS such as a stroke or other TIA (Transient Ischemic Attack). CT's are just for the comfort and security of doctors and patients. The damage from a concussion that will image with CT or MRI is absorbed by the body starting three days after the concussion. A week later, any small bleeds will be gone.

There is nothing that will show from a concussion except when the patient is in constant debilitating head aches or losing vision or motor control or such extreme situations. The plain garden variety concussion just takes time and then some more time and maybe even more time of rest and low stress.