Lost,confused,frustrated

I experienced a miscarriage on oct.10 i had experienced bleeding before the 10th and have been experiencing bleeding since the 10th. I had a appointment on the 13th that the ultrasound showed nothing had been there. Fast forward to 3 days ago i experienced heavy bleeding and pain with some cramping. All pregnancy tests have come back a strong positive which could be left over hcg. Had a appointment today and was oringinally told i was experiencing my period but to take a urine test. The urine test at the doctor came back positive so now instructed to have blood work which i am awaiting for results. I had been BD with my DH until recently. Im so confused and lost am i pregnant am i miscarrying still?? Has anyone been through this?