I know what you mean. I've had the seed of doubt planted in my head since I was a child. The more I believed it, the bigger it grew to this monstrous creature that has taken over me completely. Others tell me to be positive daily and it will vanish, but what they don't understand is; this isn't something that happened over night or the past week. This way of thinking has been ingrained or branded into my brain. I want to change is, but where do I start?