Welcome to BB and congrats on your pregnancy. It sounds as if you are on a bit of a roller coaster ride at the moment. I hope your HCG levels continue to rise and that you next scan shows you something more definitive. As for the spotting I wouldn't worry about such a tiny amount of dark blood, especially when you've had such a nice rise in HCG. With both of my pregnancies I had quite a bit of bleeding at 5, 9 and 12 weeks, (and mine went red) but I still went on to have a healthy baby boy with PG #1 and I am currently being kicked in the ribs by PG #2. When I had a m/c I started spotting and it just kept getting heavier and heavier and when I had my HCG levels tested they low and dropping very rapidly. I think your appt is going to go just fine but I'll be sitting on the edge of my seat until then.