I had this with my last pregnancy(he is now 4weeks)(I did m/c 2months before this as well) This is a very normal thing, and as you already know it does just go away. I had some spotting. Good Luck, try not to worrie!
I feel your pain on thursday augest 21 I started to bleed. I went to the hospital and the baby is fine but I have a subchorionic hematoma. I have heard that most weman have a normal pergnancy with minamal to no bleeding. The hardest part for me is the pelvic rest and not being able to pick up my kids.