Blood clots in the lungs happen suddenly. If you pay attention to how abruptly your symptoms started, you will be able to help your doctor think about a blood clot in the lungs as the possible cause of your symptoms.
There are many possible symptoms of blood clots in the lungs. You may only have one or two symptoms, but it is important to pay attention to how you feel. Even with seemingly mild symptoms, you feel very distressed when you have blood clots in your lungs. You feel like something just took out all your energy.