[Jjmomomo]

I was pregnenet for 7weeks and I did surgical abortion through D&c 4weeks ago. After that, I didn't bleed at all. Then, three days later, I started to bleed, it was not a heavy bleeding, it began lighter and lighter then stopped after 4 or 5 days. I thought  it would totally stop, but I was wrong, sevall days later, it bleed again, but very little and turnned to be brown and then stopped after3or 4 days. And then the brown discharge goes on and off, not much, a little, no smell, One week ago,I went back to do the checkup exam, the clinician said it seems fine and they ran some urine test to confirm I was not pregnant anymore. But when I did the pregnancy test in my home yesterday, it showed I'm still pregnant . I'm still have the brown discharge right now,sometimes a little bit pink, it really  bother me!
Could something be wrong? Is that possible my abortion is not compleleted? When the brown discharge could be done? Thanks for your help. I'm really worry about that.