Can a chemical in balance from taking tricyclic ad and benzo then stop ct cause head pressure, throbbing, numb and faint feelings all day for months?

In the short term: Abrupt discontinuation of either can cause "discontinuation" issues such as you describe or even seizures in the case of high. Dose benzo use. They have not created a permanent imbalance. In fact, if you are having vague sx's that cannot be explained, consider restarting mental health treatment. If tired all the time, not sleeping at night, that can cause sx's and be sign of anxiety, mood prob.