Whiskey- Best to get this checked out a.s.a.p. I had periodic chest pains (no don't even go there) and had a stress test done a few years back to establish a base line. Turned out to be exercised induced asthma. The stress test takes about 25-30 minutes and be prepared to run your a&% off on a treadmill at different speeds and inclines. Every 5-10 minutes they will take heart rates and pulses to determine where you are on the scale and see if anything abnormal comes up. Wear comfortable cloths and good tenny runners (sneakers). Let us know how it goes and your smart for not letting this go undetected.

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"It's normal for these things to empty your wallet and break your heart in the process."
2012 SLK 350
1987 420 SEL