Faint lines and now Not pregnant on Digital?

I have taken a few pregnancy test strips from online
from this website (http://www.early-pregnancy-tests.com/pregnancytests.html?gclid=CKmtuZCdz7QCFQeynQodOHoA-g) and they all came up faint positives in the last few days and this morning I decided to take a clear blue digital and a test strip, the test strip came up faint positive, just like the ones I posted online in another post... and the digital came up as not pregnant!

I am so confused! :/

two words: blood test.

Digitals aren't as sensitive as test strips are. Your hormones are probably not concentrated enough to pick up on a digital test yet  

My test line came out darker than the control line. It could just be too early to tell. Go to the doctor to find out for sure, or get several different kind.

I have tried so many brands LOL perhaps too early.