Anxiety takes many forms. Some of them have names like general anxiety (unexplained fear), social anxiety (fear of being seen and heard), specific phobias (fear of things or events).
Happiness is a general sense of well-being. Depression is a general sense of not being well. Often depression and anxiety go hand in hand.
Depression and anxiety contributes to many other problems such as substance abuse, difficulty making decisions or setting goals, and even relationship problems. When we experience anxiety or depression, we are reluctant to take risks or connect with others. We feel stuck.
My approach to anxiety and depression employs short-term psycho-dynamic therapy to help you reduce the intensity and frequency of these feelings and mindfulness therapy to help you calm your mind when they do occur.
Recommended reading: MIndfulness: An Eight Week Plan for Finding Peace in a Frantic World by Mark Williams and Danny Penman.