CONFUSED!! Neg blood 3 positive urine diff brands

Savannah
So about 10pm of Feb 1st, I got a BFP on frer. The next morning 7am another positive but barely there. I'm talking eye squinter. Call the doc and she takes a blood test Feb. 2nd. Called yesterday it came back "negative." All she could say was I had a bad batch of tests. So I started thinking chemical pregnancy bc I have had 2 of those last year. But this morning take another and BFP. Period due Friday. WHAT IS GOING ON? I thought it had to be in your blood before it goes to your urine. The one I took this morning was not a frer. It was ept. And I'm still having pregnancy symptoms.