Positive faint and period

Hi everyone!

The pictures show my tests, I had a positive on a clear blue digital and then the others were faint FRER. Some of the lines are visible even if faint, but last night I had a little bit of brown discharge. Today I actually got my period!! 😭😭😭😭 even my doctor said the tests are 99% accurate so how could I get a positive and then a period??!!! I am so confused and lost. Has anyone ever had something similar happen? I don’t think it’s a chemical either as the bleeding doesn’t have clots. I have a blood test scheduled tomorrow and now I don’t know what to do. Should I cancel it???