Answer
It sounds like you have OCD, as you have continuous and relentless preoccupation with your symptoms. This isn't surprising, as OCD is just another form of TMS. In fact, anything that serves as a vessel of fear or preoccupation is a manifestation of TMS, whether it's OCD, anxiety, or specific phobias.
The short answer to your question is: teach your primitive brain that the world is safe. Incessant fear/preoccupation is what the brain does when we're in a state of fight or flight. Like a child on the playground constantly looking over his shoulder to make sure his mom is still there, your brain constantly goes back to a familiar thought as way to try and feel safe (though it isn't a very effective strategy...)
Working to teach your primitive brain that the world is safe on a fundamental level negates the need to engage in this repetitive (and sometimes tortuous) behavior.
I suggest working with a therapist to get underneath the fear and preoccupation. If you're interested, I have a TMS therapist colleague, Ed Walton, who specializes in Skype treatment. He's had a ton of experience working with OCD and has had a lot of success with it. Shoot me an email if you'd like me to introduce you to him.
Alan
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