Just because you still have a positive test does not mean you didn't have a miscarriage it can take weeks for your hormone levels to drop to test a negative it will also take longer if not all the tissue was passed go get checked out only way to know forsure
You'll keep testing positive until all the hcg is out of your system and that can take weeks
It's going to take a couple of weeks for the pregnancy hormones to leave your body completely so testing positive is normal during a miscarriage