Janice
I have had numerous blood clots and finally after I had clots in the lung they decided to test me for any clotting disorders. I have factor V leiden. It is a hereditary clotting disorder. I tested my children and one of them has it too. They have discovered so many different types of clotting disorders just in the last few years. Factor V has just been discovered in the last 7-8 years. My first clot was 21 years ago. A simple blood test is all that is needed to discover these disorders. If you are worried just ask your doctor for a blood test on clotting disorders. Good luck