If you're unfamiliar with the imposter syndrome, Wikipedia defines it as "...a psychological pattern in which an individual doubts their skills, talents or accomplishments and has a persistent internalized fear of being exposed as a "fraud". Despite external evidence of their competence, those experiencing this phenomenon remain convinced they are frauds, and do not deserve all they have achieved."
If that idea resonates with you, you're not alone (despite it being a lonely feeling). Even the most accomplished, qualified people get caught up in the imposter syndrome. The reason it's so common is because these imposter thoughts are disguised as our own thoughts. However, the people in your fan club do not share those sentiments. If they did, they wouldn't be your fan club.
In reality, the imposter is not YOU. The imposter is actually those self-deprecating thoughts and fears. Weeding out these imposter thoughts can be emotionally taxing, and yet it is so necessary to your joy and fulfillment.
Knowing your Blueprint is a step in that direction, because it gives you confidence in the things that are uniquely you, and helps you release the rest. The road is long, and there are obstacles, yet nothing is impossible.
To hear from someone who overcame this imposter feeling themselves, check out this interview with Elizabeth Hagenlocher.