I am diabetic, and recently was put on 10 units of insulin a day, and metformin 1000mg twice daily. Yesterday morning I noticed my stool being black, but did not thing anything of it. In the evening I felt weak and dizzy. I checked my blood sugar and it was 124, I also checked my blood preassure and it was 89/60. I remembered I had not had proper lunch (just a couple of bites of diced chicken breast and vegetables), so I ate the leftover thinking I just needed to eat. I left work and as I was driving I felt nauseaus. As soon as I made it to the parking lot I felt weak again and began to vomit, no blood, just what I had had for dinner. I went to the ER and was ckecked. this are the results: BP 114/66, glucose 201, but the most alarming hgb 11.9, and hematocrit 35.3. An EKG revealed no abnormaties. Today I continue to have jet black stools, and have made an appointment to see the GI doctor for tomorrow morning. What s your opinion?