Some of the symptoms of stress include tiredness, lethargy, irritation, lack of concentration and many others. There are also a number of physical symptoms and behavioral symptoms of stress.
I write more about this in this article on symptoms of stress.
Stress can affect your health, so I hope that you are proactive in your stress management.
Here are some relaxation techniques but also hope that you see a medical professional.
All the best, and let me know how things are going for you.
Kell