My line progression

Is this normal?! I'm going crazy! Thought maybe I was having a chemical cuz my lines were staying so faint and the test from the doctor was "borderline". Is it possible my levels are just rising reeeeeeaaalllyyyy slow?? I want to be excited, I just don't know if I can yet. I'm aprox 4 wks, 1 day pregnant by my LMP. The last test was taken this morning with FMU, 14 DPO.