I haven't had a period since August 23rd (my last day) and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> says my period was supposed to start 4 days ago. I bought a pregnancy test today just to get it out of the way. When should I test?? I am way behind on periods. Normally I'm irregular but not this late. My last pregnancy test was in August 3 days BEFORE my last period.