strangest thing

ashley

I am 4 days late for AF, 12 dpo, and still getting negatives on every pregnancy test. and not even a faint line either. I have had mild pulling and stretching lower stomach cramps for 1 week straight. my back has been absolutely aching for the past 5 days. I feel very different, and feel like i'm pregnant but wouldn't the test have shown by now, at least a little?