I really hope I did not worry you more. If the doctor was concerned it will damage your placenta they would have told you. 1 cm is very tiny. At this point in your pregnancy the baby will grow so quickly 1 cm is not going to be a threat. Like I said, my SCH was much much bigger than yours and my doctor told me that by 14 weeks its size would be insignificant in comparison to the size of the baby and sac. I did go on bedrest, which stopped the bleeding and healed the blood clot. My bleeding sounds a lot worse than yours though. I literally would be gushing blood once a week from week 9-12. That is in addition to the two small bleeds I had at week 4 and 7. I have had friends who had small SCH, like you, and they only saw blood one time. I would just try to take things easy for a little while, but try to keep positive. At 13 weeks I literally cried in my doctors office that I felt hopeless since I kept bleeding. A week later my blood clot was healing and 11 weeks later I have not seen anymore blood. You and baby can get through this even though it is very hard and scary.