In February I Was Hospitalized With A Gastro Bleed. I

In February I was hospitalized with a gastro bleed. I am on warfarin and I'm scheduled to see a hematologist (not sure of the spelling) on Thursday. No sites of bleeding were noted when I had a colonoscopy before I left the hospital. My question to you...what good questions should I be prepared to ask this doctor. I was in no pain during this. I did develop a fear of the blood thinner and wish I could go elsewhere that. There may be a family gene issue here, but I have never been testing, although both brothers have had DVTs also. I have had two.