Anxiety disorder Usually self-diagnosable Symptoms include stress that's out of proportion to the impact of the event, inability to set aside a worry and restlessness. People may experience: Whole body: fatigue, restlessness, or sweating Cognitive: lack of concentration, racing thoughts, or unwanted thoughts Behavioural: hypervigilance or irritability Also common: anxiety, excessive worry, fear, feeling of impending doom, insomnia, nausea, palpitations, or trembling Consult a doctor for medical advice