It could be a rational or an irrational fear which makes you feel anxious. When a person is very anxious, they might lose their confidence and ability to think clearly. Cognitive behaviour therapy is a proven technique that helps people to come out of anxiety. A counselling psychologist will be able to guide you through the process and help you to relax and calm down besides getting your confidence back.

I suggest consulting a professional Counselling Psychologist, as it's a clear case of feelings and perception.

I suggest you to consult a psychologist. There would be some subtle reasons, which you might think is not the reason, or which could affect you for these kind of  symptoms.