Confused, HELP!

Rebecca

I had a miscarriage mid may, and HCG was being checked weekly by midwife. Numbers were staying around 20, however recently increased by 3. Had ultrasound to ensure entire miscarriage tissue was passed and it was. I did not take any pregnancy tests after my miscarriage, however when my midwife told me my number had increased by 3 (blood was drawn on a Friday and she called Monday with the results) I then took a pregnancy test which was very faint positive. This would only be apx 10 days after the earliest chance of conception. I continue to get VERY faint positive tests. The midwife had an emergency so I havent been able to talk to her since Monday. I am just so confused! I did not have a cycle yet after my miscarriage. Please help!! Thank you!!