New Choice (Dollar Tree) pg test.?

I have a question about these tests. I have used them for a while and i have witnessed an evap line and stark white negatives :) i am testing 4 days before my period is due, I used FMU this am and i got about 1/8 of the test line that showed up positive, not faint and the same color as the control line (within 10 minutes) has anyone had this before? i looks like a smudge or a dot almost. has anyone heard of these defects? or is this considered a positive? opinions would be great! thanks!!!