Why am I afraid to promote my blog?

I can clearly remember being six years old and sitting in my elementary school bathroom thinking. I can see the concrete wall next to me and the metal stall divider on the other side, and hear the sound of the strange water faucet that sprayed in every direction. I was contemplating a question that recurred to me throughout my childhood and terrified me. It went something like this: What if everything people tell me is good about myself isn't really something in me, maybe it's just a combination of traits I inherited from my parents, good luck, and the conditions I was born into? At least, that is the thought I had as translated by my 27-year-old brain.
This memory flashed back into my mind while I've been reading Lean In by Sheryl Sandberg. She writes specifically about how women are more likely to think of their successes as due to luck or circumstance, while they often attribute failures to their innate flaws. She notes that men, meanwhile, often do the reverse. I've never been a man, so I can't comment on that, but I do know that I am well acquainted with what Sandberg calls the "imposter syndrome."
All throughout graduate school and my first job, my boyfriend was baffled by what he referred to as my insecurity. Before turning in every paper, before every test, and during every evaluation, the one common thread was my low self-evaluation, and panic over the failure I foresaw for myself.  In school, the closest I ever came to failure was a "C" on a test that I managed to turn into an "A" for the overall course. In life, the grades are less clear, which has made it harder.
I also feel frustrated by the mischaracterization (Blogger claims this is not a word--thoughts?) of the book's intent. My boyfriend sent me this article, which is well-written, but I do not get a feeling that the author actually read the book. The author first suggests that Sheryl Sandberg never refers to the supportive role of men in politics or at home, that she suggests women should be "emulating the egomania of the corporate male", and that she doesn't understand the struggles that most women face just to survive. Sandberg herself clarifies early and often in the book so far that this is exactly not what she is saying. Instead, the book uses simple and clear examples of how women could change the dynamic she sees in the workplace that often leaves women behind. (The diatribe against this article I have started has been edited.) I relate to Sandberg, and the women in her book, and as I read, I find myself encouraged, not to have to end up as COO of Facebook or to contrive my own "capitalist fantasy," but to feel confident in pursuing a life of personal and professional fulfillment, with a recognition of the societal barriers that I will have to face.
This comes full circle to my career, and this blog post. As a social worker, I have always been self-doubting and cautious. It took me two years of field placements and six months at my job until I felt comfortable identifying as a social worker. As a computer programmer, I feel like a complete fraud. I am always afraid of "real" computer programmers finding out about my ambitions, because I know I do not know what I am talking about. As a blogger, I wonder who could possibly want to read what I have written. And yet, I have already achieved more success than I could have imagined when I started this. I have been quoted, and in a sermon no less. I want to thank Rev. Dr. Mary Louise McCullough for this honor, and yet, even reading this fills me with an anxiety as I think that nothing else I write can possibly interest my readers. However, based on the advice given to me by a new colleague recently, I will celebrate this success, and enjoy it. I will lean in and promote my blog (as in, post it on Facebook--terrifying!).