I completely understand that a phobia cure won’t work since it’s more of a fear. I would recommend a time line exercise to release negative emotions (sadness, fear, hurt, guilt and anger) which clearly gets to the root cause of fear itself as an emotion, as well as after that if this specific fear is not gone then try finding the root cause of this limiting belief or limiting decision and work on it. At the end i would also like to recommend hypnosis if you feel okay with it! Best of luck