There's always such thing as false negatives but never false positives, take more than one of a few brands or just go get blood work done :)
Blood test will tell if you have any hcg in your body.
I would say not true. My doctor used the $1 test. Plus they could of done blood work. But then again it matters what kinda test they used. I say try something other then clear blue and see what your result shows cause those do work better then a $1test