still getting a slight positive test


I had a miscarriage some where between the 16 to the 21. I was 7w6days. if everything was correct. my obgyn told me to take a test on 1st to make sure my hcg levels was gone . I tested 1st and Monday the 4th still saying positive. confused my body still thinks I'm pregnant but I lost my little gummie bear how long till we can ttc again when will my af come. could I still be pregnant?