Does it make a big difference to test in the evening instead of FMU? I took my 3rd test BFN but all 3 times i couldnt wait until next morning i just do it straight away and i try not to buy more than one test at a time or i would use them the same day.. AF due tomorrow and i normally get really bad pains from 1 or 2 days before it starts but not this time, i have been having some cramps since O.. Confused first timer please help..