I had banged my head hard roller skating in late 1989. never got checked for a concussion. four years later, early 1994, i started experiencing depression, panic attacks, anxiety. i've been going thru these symptoms on and off since.?

Anxiety: Apprehension about traumas is not uncommon. Consult your doctor to further evaluate symptoms.

How hard?: How significant was the head injury? Significant head injury can predispose to anxiety, obsessiveness, depression, irritability, anger and decreased judgment. Dr. Ali's recommendations are sound , please get evaluated for these problems.