No period and no bfp

I'm now officially a week late and I've had no positive tests. I thought I had one yesterday but it was faint and kind of looked like a possible dye run which I've never had on a pink dye test. Well I looked at the test again after the time window had passed and the faint line was gone. My doctor won't do a blood test til I'm more than 2 weeks late. I know being this late with nothing but negatives most likely means I'm not pregnant. I didn't ovulate late, since I tracked.. I'm just confused.