You'd be wasting your time and money if you didn't start with a non-specialist. Even a psychiatrist could rule out heart disease if your pains were something else.
In the case of some folks on this thread, I'd recommend starting with a shrink.
Okay
Yes, in a pinch I might use a podiatrist for something other than feet.
And I wouldn't be wasting my time with a non-specialist. I have had a heart attack, so I wouldn't waste my time with a psychiatrist it might lead to room temperature for me.