What I believe this song to mean is that the artist (singer) was "dreaming" of meeting the Pretty Ballerina and because he rushed into the relationship so quickly ("I called her yesterday, it should have been tomorrow I could not keep this joy that was inside") Then when something strange inside said 'go ahead and find her'" he discovered that it was all a dream! That is why he described the 'Sunday morning' as being dreary and raining!
What I believe this song to mean is that the artist (singer) was "dreaming" of meeting the Pretty Ballerina and because he rushed into the relationship so quickly ("I called her yesterday, it should have been tomorrow I could not keep this joy that was inside") Then when something strange inside said 'go ahead and find her'" he discovered that it was all a dream! That is why he described the 'Sunday morning' as being dreary and raining!