Paranoid about blood clots can anyone help?

Im so paranoid of blood clots. I constantly obsess about hacing one. Every little twinge or pain I feel in my legs I automatically ume I have one. Ive had a million physical exams, countless D-Dimer tests, and about three ultrasounds. Right now i have a burning feeling in my left thigh. I guess im just paranoid because most people dont have any symptoms and bam just die. Can anyone PLEASE help!!!!