Do not self diagnose. The symptoms of anxiety can be many and varied.
People can experience symptoms from several categories at the same time.
These can include dissociative symptoms such as depersonalisation and derealisation, the 'fight' and flight' response - rapid heart beat, rapid breathing, effects of hyperventilation and muscle tension. People can also experience a number of different effects as a result of their anxiety and panic attacks. Fight and Flight Response. The fight and flight response is a natural response to danger in humans and in animals. When activated, hormones are released through the body to enable us to either fight the dangerous situation or to run from it.