I had sex 12 days ago w/o a condom, he didn’t cum. One <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> says my period is late by 4 days and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says 2 days. I have taken 3 pregnancy tests, 2 at home and one at the doctors. All of them urine tests and coming out negative. Is it possible for all of them to be false negatives? Or am I just overly paranoid?