Three benzos??? I have to fight with mine tooth and nail to get one...and I get not even enough for a month and I have been diagnosed panic disorder AND two anxiety disorders.

Benzos can cause depression...think about how they act in the body. They are not exactly stimulating in any way. I notice if I take mine too often sometimes I will have a brief downswing. I imagine alternating amongst three could make you feel foggy and maybe depressed. Also, while Lamictal does have pretty good anti-depressant properties, it is intended in bipolar as a mood stabilizer and is often paired with an appropriate anti-depressant (or med that works as one) medication.

Give yourself some time to adjust and then talk to your doc if you are not comfortable with how you feel or feel you need something else for the depression.