““Feeling anxious or on “high alert” (also called hyper-arousal). You may be jittery or always alert and on the lookout for danger. You might suddenly become angry or irritable. For example: You may have a hard time sleeping, and find yourself having really vivid nightmares. You may have trouble concentrating. You may be startled by loud noises or sudden movements. You might have a hard time trusting others—even people you previously trusted that have done you no wrong.””