Anxiety is a symptom not a diagnosis. It's a symptom of depression , It stems from trama in life , bad experiences, and grief we carry deep with in us usually it is in our subconsciousness that we carry it . If we do not deal with something it later comes out like a toxin dose . That's why out of the blue we get panic . It's just our subconscious wanted to come out at that time .. I incourage you to find out why and when you started getting anxiety and work on the reason .. u can beat this .. I did .