When Did You Doubt Faith?

Jesu had twelve disciple and they all were differnt  persons.But they new Jssus came to teach them how to be victorious in live as a child of God. Thomas was one of Jesus disciple and was labal ,doubting Thamas because he wasn't accepting his brothren claims that Jesus had rosefrom the dead.Some time problems in life can cause you to be doubtiful because it doesnot mean you have lost your salvation all ,but just beening human.