If you suspect you have cancer, it is important to see a doctor as soon as possible. They can perform diagnostic tests and give you a proper diagnosis. It can be difficult to be heard or taken seriously when you think you have cancer, but the best way to be heard is to be clear and assertive with your doctor. You can also bring a family member or friend with you to your appointment for support. Additionally, if you have any concerns or questions about your diagnosis or treatment, don't hesitate to seek a second opinion.