how long did you still get a positive test after MC


so I had a missed miscarriage and I took cytotec on April 5 a Wednesday Thursday I was hospitalized for losing so much blood it was awful, on the 10th I went to my dr for transvaginal ultrasound and she said my miscarriage was complete and I was only spotting light to none brown blood, yesterday I had no bleeding decided to take a pregnancy test and it’s still positive. Now my question is how long is it till I get my negative test ? I feel like it should be negative I’m not sure ? Thanks in advance for any response and I’m sending you all love 💓💓