“Cancer Anxiety ”

Hi Doctor i hope your doing well. I had a question I wanted to ask you as an oncologist. I am a 28 year old healthy male with no underlying conditions that is constantly fearing will develop cancer. This has literally made me paranoid and cannot stop thinking about it. I have no family history of cancer and I have done my routine medical checks and everything is normal. Can you please give me an advice if I am by any chance in a high risk of developing any form of cancer and how to prevent it. To add, I have quit smoking 2 years ago, eat a healthy diet and exercise more than 2 hours a week. I appreciate your help.