I, also, was on blood thinners for many years and was given 4 units of packed red cells when my hemoglobin dropped to 3.7. They could not find why the loss of blood after a week of testing in the hospital. I even had a bone marrow biopsy. This was 3 months after I was hospitalized with covid back in 2020. Over the next few months my hemoglobin continued to drop, so I decided to make an appt with a GI Dr. He found multiple arteriovenous malformations in my small intestines and cauterized them. I have not had an incident of blood loss since then. Since there was a history of blood loss my cardioelectrophysioloist suggested a Watchman implant. I was thrilled that I could come off Xarelto. Had the implant without incident and went home the next morning. Continued on antiarrythmic for 5 more months and have not needed anything other than 81mg Aspirin daily since then. Had an ablation at the time of the implant. Now I'm suffering with pulmonary hypertension and grade 3 diastolic dysfunction, which has nothing to do with heart rythym, but was there the whole time and Dr didn't catch it. I finally went to a pulmonary Dr regarding my shortness of breath. Through many rigorous testing I was then diagnosed.