I agree with alaysha... It can take a while to show negetive again. My sister had a miscarriage in April and I think she retested about a month and a half later and she was still getting a positive, which made her think she was pregnant again. She wasn't pregnant so it was very misleading. I hope you are able to see a doctor who can really help you. Sorry about your loss!!
Sorry I meant to say it took 4 weeks to stop showing positive on a pregnancy test.
It can take a while for your levels to return to 0 after a miscarriage and a d&c and until they are a little lower you will still show positive on a pregnancy test and bleed on and off. When I had a d&c it took 6 weeks to stop showing positive on a pregnancy test and another 2 after that to get a period. If they havent returned to 0 in the next week though you may want to contact another doctor to get checked to make sure there is no tissue remaining in your utetus.
I don't have the slightest clue as to what you are experiencing but it defintely sounds serious enough for the emergency room I hope everything works out