Im really confused about my dads D-dimer levels after his COVID recovery. His first test showed 1800, but we didnt find out until five days later. He wasnt showing any clotting symptoms, so we checked with a doctor who recommended blood thinners. We decided to get another test done at a more reliable lab two days later and it came back at 160. He had been taking dabigatran 150 BD during those two days. We re-tested after 15 days, and the D-dimer was 180. Im trying to figure out if the blood thinner could have caused such a big drop from 1800 to 160, or if its safe to just disregard the first test as incorrect and stop the meds. Could you help me understand whats going on?