Hi Better Days,
Can I gently suggest that you shift your energy towards treating the anxiety, rather than doing searches and inquiries about possible health related problems?
I think that you might very well find that by doing this, a lot of your symptoms will be reduced or even eliminated!
Here are some resources to get you started.:)
Self Help sites with breathing/relaxation exercises instructions
Panic attack relief exercises:
http://www.healthcentral.com/anxiety/c/73076/34334/breathing-lessons/
http://www.healthyplace.com/
http://www.stress-relief-exercises.com/
http://www.ehow.com/video_4405003_breathing-exercises-panic-attacks.html
http://www.psybersquare.com/anxiety/panic_relax_I
Books for overcoming Health Anxiety:
http://www.amazon.com/Feeling-Good-New-Mood-Therapy/dp/0380810336/ref=sr_1_1?s=books&ie=UTF8&qid=1379950432&sr=1-1&keywords=Feeling+Good%3A+The+New+Mood+Therapy+by+David+D.%2C+M.D.+Burns
http://www.amazon.com/Overcoming-Health-Anxiety-David-Veale/dp/1845298241
http://www.amazon.com/Treating-Health-Anxiety-Cognitive-Behavioral-Approach/dp/1572309989
Scaredy Cat