I think questioning your own Narcissism is a healthy response for everyone. I have also spent a lot of time looking at my own self-absorption and ways I might act like a Narcissist, at times. I think there are a variety of other mental health challenges and contexts that would bring someone to act in a Narcissistic way. I did not include all of these possibilities in this article, because I could write a book in order to be nuanced to the degree I think is needed.
At the very least, this article is evocative, and encourages people to look at their own behaviors, and question where they are on the Narcissistic spectrum, as well as investigate their potential attachment to being identified as an Empath.
It is very likely you are not a Covert Narcissist, but perhaps have some Narcissistic traits. You clearly have the reflective capacity, and a strong enough sense of self to tolerate seeing your Narcissistic traits, which for many people with NPD, is near to impossible for them to do, or at least publicly post about.
*I cannot diagnose you with NPD, obviously, but from what you share here, and based on my experience in working with people and my education around psychology, I can tell you what my immediate perception is, based on your response.