miscarriage on 11/12

I had a complete miscarriage on November 12.  I bled for about 10 days.  My doctor said she was going to have me come back in and do another ultrasound (if I bled for more than 10 days) to make sure everything was gone.  Since then, I Have been taking opk's and they have been peak or high almost every day for the last 2 weeks.  I spotted for a few days last week, and I started spitting on Sunday and am still spotting today . I took a pregnancy test last night and had a very very very faint line - then I took a different one today and negative.  Can anyone relate or have a similar experience?