HELP?!!!

Hi All,

I had a miscarriage back in October and have been waiting for my HCG blood levels to return to normal . My doctor contacted me 2 days ago to confirm that it's now in the normal range under 5 .

I just took a test to make sure it's be negative for future purposes however its still come up strong positive . . Shouldnt it be negative if it was back to normal range??? I had a scan last week to confirm there were no remains and no ectopic . I'm so confused