Positive hpt but negative blood test?!

Saleemah

I’ve taken 3 hpt, all with a faint line. Yesterday I went to the doctor to get a blood test. It came back negative. I had brown spotting a week after my period was due. The nurse said that it was my period. But im still having vvfl on tests. Has this happened to anyone? What should I do?

These are the tests from Saturday to Monday.

This morning

All lines showed up within the time frame so it’s not an evap.