3:1a "By night on my bed I sought him"; cp. 5:2, "I sleep, but my heart waketh." Plainly a dream.

Dreams are like unbelief in that:

1.  They ignore the true facts.
  (1)  He still loved her
  (2)  He was safe.
  (3)  He had come for her in due time.
  (4)  She loved him and believed him.
2.  They intensify and play upon such emotions as fear.
    "Fear hath torment." "Oh ye of little faith, why are ye fearful?"
3.  They are abnormal.  People who work hard and eat properly, rarely dream.  So doubts are not normal to the Christian, though they may often occur.
4.  We do tings in dreams, and in moments of unbelief, which we would not otherwise do, such as:
    Running around after him in the city.
    Inquiring where he is.
    Grabbing hold of him as though he wanted to get away from us.
    Seeking to make him do for us what he has already done (become bethrothed).
5.  Doubts simply hinder, never help.