Hi. I had an unprovoked PE 5 weeks ago diagnosed by CT scan with contrast dye. My main symptom was a rapid heart rate over 200 beats a minute. When I read about symptoms this doesn't get mentioned so I'm concerned in case there was a heart problem as well. I am having lots of tests as have been told I may have an undiagnosed cancer. I was diagnosed with overactive thyroid last August and iron levels dropped at the same time. I also have a slightly raised platelet count. I have been tested for Jak 2 and that is negative. Could there be a link with the hyperthyroidism? I am on Dalteparin injections daily. I saw a cardiologist at the hospital I was taken to for the PE before discharge and he said if I was his patient I would be on anticoagulants for life now, but when I saw my GP she said they will take me off the medication 3 months post-PE and test me for thrombophilia which they can't do at the moment because of the medication. I'm scared if they take me off the anticoagulants I will have another clot. Does anyone have any advice or has anyone had a similar experience? I work in the medical field myself but this has really frightened me.