“Cancer Anxiety”

I am a 28 year old male with no medical history and no current medical conditions. My only concern is that I am constantly worried I will get cancer and this does not let me enjoy my life. I wanted to reassure myself and get an opinion on how I can prevent it and live life. I have done my blood test everything was normal. I have no history of family cancer. I have quit smoking 2 years ago and am physically active everyday.