Your limiting belief probably started with your childhood experience.
Eugene Seah shared a story at https://www.facebook.com/SayYesToAbundance/posts/1605377313004598
Watch your inner conversation. What are you saying to yourself? Are you reinforcing the limiting belief? If you need help to break the pattern, pick up NLP or attend an NLP course. I learn NLP from reading especially Tony Robbins classic books. It really help to reprogram my mind.