You are misunderstanding the meaning of ImPACT scores. The ImPACT system is primarily used to pull athletes off the field. The ImPACT system only tests a narrow set of functions. Then, it can be combined with other symptoms assessments to determine of the athlete is healed enough to return to play. A return to normal ImPACT score does not overrule continued fogginess, headaches, dizziness, or any other PCS symptoms.

Since you do not have a baseline ImPACT score, They can only use the broad baseline. This is problematic. Return to 80% of the broad population is not relative to 'your' pre-injury function levels.

The only value of the Zoloft is to treat the anxiety and depression. It does not treat or contribute to healing your concussion. It masks symptoms rather than heals them.

What have you been doing to facilitate improvement ? Are you moderating your activity levels ? Are you doing anything to minimize anxiety levels ? What about nutrition and dietary toxins ?

What are your daily activities like ?