Ok so I had my period the 15 trough the 19 I was using a different <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> and just discovered this one today my other <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> said I was fertil the 18th through the 23rd we'll me and my boyfriend had sex this morning and he used the pull out method when I downloaded the app it says I'm 33 percent fertil is there a big chance I'm pregnant now