You can’t drop self-doubt
That is a part of you, no different from your physical features and your experiences.
Don’t ignore it or try to cover it up using some “technique.” Your doubt isn’t going anywhere, so don’t waste your time.
That is like trying to suffocate yourself by holding your breath.
Any time you get close, you’ll just open your mouth. Just like any time you try to ignore your self-doubt, it will reappear in front of you, like a scary child from a horror movie.
Instead, acknowledge that your doubt is there and get to work anyway.
The space between idea and output is execution, and it is a path full of doubt. Part of the art of being a professional is learning how to cross that road.
Time to start walking.