still getting a positive test..

Cierra
Hello ladies. I went in for my first ob appt the end of May. I should have been 13 weeks. Baby measured on 6 weeks with no heart beat. On June 1st I took meds to start the process and had the baby on June 2nd. It's now June 20th and I'm still getting a positive test. We've had unprotected sex a few times since miscarriage using the 'pull out method' 
Could I be pregnant again or are my levels still high from miscarriage?? 
Thanks!