clear blue tests

Rebecca
Hi guys,
I put a post up yesterday about me finding out I was pregnant. I am just wondering though, I took two cheap ones before the clear blue and the lines showed up dark before the pee hit the end of the panel! So I did a clear blue and it said 2-3 weeks. Could I be further along considering how fast it showed on the others? Or are clear blue normally accurate? 
I don't no if I'm just over thinking or if I could be further then I think.
Any help would be appreciated