I guess it helps to here others say "YEP...I FEEL EXACTLY THE SAME WAY" I almost started laughing and feeling better just reading what you guys were saying. that's rare. I have suffered from panic attacks, Anxiety and OCD for about 15 years on and off. The past 2 years have been nothing but on... and I mean on. Full speed.
I have chest pains and shortness of breath 2-3 times a day, leg cramps with chest pain just knowing it a blood clot, arm pain, numbness in my face and arms. I fight so hard to not just run to the ER. heck! I turn my head to fast I think my neck is going to break. what

I have had all the normal tests - EKG, Stress test, Blood Tests and the only thing wrong with me is I got Adult onset asthma about a year ago when moving to a new State. That sucks and I think that contributes to the problem, but I take the good days with the bad.
I take Xanax daily along with Klonpin - two very addictive drugs - and have been for about 2 years. I really could care less because the work. I only suggest these for the short term, but wow do they work if you are willing to try medication. I will never take an ant-depressent for this again. i have had several and those things are evil if you ask me. Glad they work for some.
There is hope for all of us. I read books about the subject, study online, ask others, ask doctors everything I can. Knowledge is power and sometimes that one little thing can ease the pain and worry.
In a way i think somewhere there is a silver lining here. When I am driving along and i get a sharp shooting pain in my chest and loose my breath for a second, I have no idea where that silver lining is. But on the flip side i have quit smoking, drinking even thought I am about 15-20 pounds over-weight - I am totally in-tune with healthy foods and nutrition. My last cholesteral and blood sugar screening the Dr said "Keep doing what ever it is you are doing" It was perfect. So that is always reassuring and maybe since I am only 32, this healthy eating i do will pay off in long hall.
hence - my silver lining.
Bless all of you as I know exactly how you feel... Please feel free to contact me if you have any questions.