So I had sex 10 days before my period according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>. My BF --- inside twice on March 26th. I had a cramp around 3:30am  that night which was basically the 27th of March. Could I get pregnant even if it's not on my fertile window.? Do I wait for my period to know for sure?