Confused

Yesterday I got 4 positives in FRER’s. I went to the dr to get bloodwork done and the test came back negative HCG at 2. Anyone else have this experience? Today I took 4 more test of all different brands and all are very clearly positive. The 2 FRER’s from today are significantly darker than yesterday’s. If I am in fact pregnant, I would be approx. 3 weeks 5 days. Thanks!