Worried

My period started about a week late. Took two tests and were negative. Then went to the doctor and had a blood test done. Came back today Positive about 3 weeks. But my period also started Nov. 4th and it’s a little heavier. Doc said to go back in 2 weeks for a another blood test and should be 0.

My question is am I having a miscarriage right now or could I be pregnant still?