No hate, just advice!!

So I heard you could use a couple drops of your blood on a test and it would be accurate since it looks for the same hormone.. I looked at the test 1 min after and it was negative, I should’ve waited 3-5 and I didn’t but I put it away and I just checked it and it looks like this.. anyone who’s done this, is it possible to get an evap line line this with blood?