Every thought that comes into your mind — whether it comes from you or from some outside influence — has an effect on you. Every single influence, submitted to your mind often enough, will translate itself into its physical manifestation.
It is scientifically impossible for thoughts of fear and self-doubt to manifest materially as success.
Every fearful thought, every single moment of self-doubt, pulls you further and further away from the finish line of success (in whatever way you define success).
If you claim to want your picture of success while still entertaining doubt and fear, you are acting against the laws of science as we know them. No wonder you’re seeing it progress!