Hi there S.!
I had sort of the same thing go on with my last pregnancy. There was bleeding from the placenta that they could see, but, they were unsure of where it was coming from. The bleeding was pretty significant. I was about 6-7 weeks along. I, of course, ran straight to the hospital(first time pregnant) and was given a Rx for pain meds and told to go home and wait for 'it' to happen. Luckily it never happened( I didn't bother getting the Rx filled either) and I gave birth to my beautiful daughter on 07-18-06.
Just take it easy and REST! I really hope it works out for the best for you! Take care - Les