Late period

My period is late by two days according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>. I had my period on the 13th of November until the 18th, when should I be due this month?? Also I've had unprotected sex twice since my last period but either times my boyfriend didn't ejaculate as it was only for 5 minutes or so. It wasn't long enough for him to finish!