Anyone else???

I’ve been getting faint positives for the past few days but they’re not getting darker. Af is still late. I’ve tried ept, clear blue, and frer..all very faint lines but when I went to the doctor today their urine test came back negative and they wouldn’t do a blood test. I’m really hoping this isn’t another chemical/miscarriage . Has anyone else had a similar experience and gone on to have a healthy pregnancy? This is the test I took this morning before the I went to the doctor. It comes up right away every time but it just won’t get any darker 😣