So, they did the echo a few weeks ago. I just took the wear-it-for-24-hours monitor back today. I assume I'll get a letter saying they didn't find anything. Which is not surprising - I really don't think it was my heart. Something else is going on that waxes and wanes.
Oh, well. Until the other shoe drops, I guess I won't know. If I go back to the GP it'll be another several months before I get to a specialist. And given that she insisted on me going to cardiology, I can't imagine who that specialist will be.