This can appear as chronic and excessive anxiety, stress or worry. According to the DSM, it typically occurs more days than not. Symptoms may also include difficulty controlling the worries or even "feeling out of control.". Some people have extreme stress when trying to concentrate or make decision.
Individuals often will feel like their "mind is going blank" or experience tunnel vision at the time. Other individuals experience symptoms and behaviors such as restlessness, irritability, easily fatigued, a sense of doom or overall fear about the world.