Then you can begin to substitute more positive and therefore more useful patterns of thought. Try writing these things down in a notebook. A Counsellor can help you to develop this approach so that you can be more realistic about those things in your life that are positive. Practice ways to distract yourself away from negative patterns of thought. Activity is good in this respect.
Negative thoughts can generate feelings of anxiety.
Learning relaxation techniques can help a great deal. A Counsellor can help you to learn a variety of physical and mental relaxation techniques that will be useful for you in the future. Try to explore the way you are feeling. Write them down, and see how they may relate to your own thinking about yourself or to things that happen in your life. By so doing, you can avoid them controlling you.