Stress is an ancient human reaction that automatically pops when we feel inadequate when dealing with demands and expectations. Stress makes us focus on either running away from an issue or fighting whatever threat we are facing. For thousands of years, stress has been super convenient in making humans survive.
But sometimes, stress is far from helpful. For example, when we have trouble concentrating or are constantly irritated, our thoughts are just spinning around. Then it can be a sign that we have too much going on at the moment.