One of the things that Tom and the rest of us advocate here is that when faced with a medical problem, you make use of what help the licensed medical authorities can provide to you. Do not neglect them in favor of metaphysical approaches. We do not practice medicine here. That being said, here is what is said on the government web site. This is from a booklet which you can download from the link given below this quotation. They discuss multiple types of anxiety disorders.
Anxiety Disorders affect about 40 million American adults age 18 years and older (about 18%) in a given year,1 causing them to be filled with fearfulness and uncertainty. Unlike the relatively mild, brief anxiety caused by a stressful event (such as speaking in public or a first date), anxiety disorders last at least 6 months and can get worse if they are not treated. Anxiety disorders commonly occur along with other mental or physical illnesses, including alcohol or substance abuse, which may mask anxiety symptoms or make them worse. In some cases, these other illnesses need to be treated before a person will respond to treatment for the anxiety disorder.
http://www.nimh.nih.gov/health/publicat ... l?rf=53414
Effective therapies for anxiety disorders are available, and research is uncovering new treatments that can help most people with anxiety disorders lead productive, fulfilling lives. If you think you have an anxiety disorder, you should seek information and treatment right away.
This makes anxiety disorders very common as occurring in nearly 20% of the US population. In terms of MBT, I at least cannot tell you where these things originate. Perhaps Tom has access to more information. I have given no thought to that before. Some aspects are obvious to me but do not really tell us much that is useful so I see no value in going into them here. I do want to make sure that you are getting suitable medical help with this problem as we could not legally help you in terms of any kind of treatment recommendation.