Feeling blockage in heart

I'm not sure if I'm in the right place, but I hope someone can help.

Sometimes I feel (Mostly when I am sitting hunched forward at my desk, but sometimes standing too.) what I can only call a blockage under the right side of my heart. Perhaps it is best described like this: if you take a garden hose and bend that hose at a certain spot, then felt the water rushing through that bend/kink, that is what it feels like. It is sometimes followed by a cold drip-like feeling. I can stop this kinking feeling by arching my back and thrusting my chest out. The last time this happened, I waited, to see if the feeling would pass. It didn't; it only got more painful and then the muscles around my heart in the chest area got very sore and tender for a few days.

I've had numerous physicals and checkups and always got a clean bill of health. I'm not on any medications, am not overweight (although I am about 10 pounds over my goal weight) and I have exercised regularly (3-5 times per week) since I was 12 (I am now 35).

I have had other irregular aches and pains in this area before and there is no history of heart disease in my family. Any ideas what might be wrong?

[achillea]

The facts that your pain is relieved by changing position and that you have soreness in the chest area for a few days indicate that the discomfort is not heart pain but rather something exterior, like a muscle spasm.

Heart pain is a very special animal, and when you have it, you are going to KNOW it.  Here is more information on what it feels like in comparison to non-dangerous pain:

http://heartdisease.about.com/cs/coronarydisease/a/CP2.htm

[Oolish]

Thank you! I'll check the link out.