I think your cardiologist is the one confused. A blockage cannot form between 2008-2014? which is 6 years. That is pure nonsense. I've had a blockage go from zero to 99% in less than a year and I know other patients who have experienced this too. For a lower risk alternative to a cath, and to confirm things one way or the other, I would ask for a nuclear scan. This shows two images. The first shows how good the blood supply is to your heart when resting, the other when the heart is working harder. It will reveal any problems with the blood getting through. As for waiting to see, I think your cardiologist must be deluded. What happens if there is a blockage, you form a clot, then die from it? Will he just say oops?
I'm so confused. I have an appointment with my primary doctor on April 28th to hopefully get some direction.
As a heart patient, I myself would not find anything helpful or useful in what this cardiologist apparently told you. He seems to have told you that he found something to worry about, but that he wasn't sure, and kind of left it up to you. Oh, wait: That's his job.
Frankly, I'd get a second opinion.