Do you have anxiety? There are at least six different types and the most common symptom attached is actually depression. Although a host of neurochemicals: GABA, serotonin, dopamine, norepinephrine, and many others are responsible for controlling anxiety, cortisol, an glucocorticoid horomone secreted by the adrenal gland, is mainly responsible for your ancient "fight or flight" response.
I have panic attacks, how about you?