Correction. It is not the only choice, but you do have it. Good luck.
For anxiety, I am an advocate of taking action and of adopting a can-do frame of mind. In this situation I would not worry for one stinking minute. It simply never makes sense to do this. We all have only one choice and that is to take charge of ourselves and our situation. You'll notice your anxiety subside as soon as you start to comprehend this in your life.
For myself, I was once told that I was a 2 (due to short run VT). I appreciated knowing the specific reasons for this, even though it initially created some concern on my part. However, before I could get to the diagnosis of being a "2", I had to first force the data collection service to turn over my event monitor results, then provide these results to a second doctor, who then diagnosed me as a 2. To this day, I am unclear on how doctor #1 missed it, or why the data collection service initially refused to provide me with my own medical information.
So OK. You don't need to be like me. It is easier to ask people to explain themselves first. I am just in the habit of getting to the bottom of technical discrepancies because I do this sort of thing on my job every day of the week. I also occasionally get pushy when I know I am getting a run around. But then, my preference is to know what I am dealing with. Some people are ok with not knowing and that is ok too; afterall it is also true that it takes a lot of work to put some medical information in perspective. In this way, if you are already anxious, by just telling you that you are OK, the doctor may be saving you a headache.
Its not uncommon to have an abnormal EKG, and an EKG always requires further clinical evidence and symptoms to validate. The fact the doctor didn't feel it necessary to do any further testing indicates the test result does not have any additional signs or symptoms to support a diagnoses. There has to be some misunderstanding because a 3 does not reference anything to do with an EKG in the context you express. Further more a technician should not have said anything that could lead you to have anxiety...
Anxiety certainly can be an explanation for your symptoms, and unlikely to be associated with a heart problem. If the symptoms continue, you may want to see a doctor just to rule out anything serious.