Do IC HPT'S ever get very dark line?

Leslie
I'm 10 DPO and have taken a few IC HPT'S and 1 Equate HPT. The equate HPT was a squinter at first, but dried noticeably more visible. The IC's that I have say to wait 5 min. At 5 min I can see a line, but very very faint one. Is this just how they are or is it because I'm very early if I'm actually pregnant? I'm obsessing I know. I go to the dr Wednesday so I can confirm either way with a blood test. Just curious cause this is my first month using these HPT'S. They are the blue Wondfo ones, but I think they are fakes. Although they say Wondfo on the back.