ccdean,
That's always a dilemma...angina or GERD! I went through it for 10 years.
If you can do it without breaking the bank, have a stress test...it sounds most like angina.
Angina and GERD have such similar patterns, and many people (more than coincidence I'm convinced) have BOTH!
Some SLIGHT differences...
Angina can occur on an empty stomach more readily than GERD.
Angina goes away when you STOP climbing the steps.
GERD responds to acid blockers.
Angina responds to nitrates and beta-blockers.
But beware calling a discomfort after a meal GERD...angina like to act up then too.
The diagnosis can elude your GP...get a good cardiologist to make the call.
Short of breath when you talk or climb stairs really sounds like cardiac ischemia to me...do you get pain or burning in chest or shoulders? Can you RUN?
How do you do walking fast into an icy wind? (Weird question this time of year.)