Someone with a anxiety disorder could take numerous treatment routes, such as taking medicines, which would make you feel more uplifted and more alert, and somewhat more happy, and less tired. Also, as a treatment option, you could take counselling, which could help your mindset on certain things and make you feel less stressed, or, you could read books which are more like workbooks, which can be prescribed by a doctor, but can also be found in libraries locally.
-Hope this helps!? Xx