This so reminds me of something that I had to register to this site to comment. After my child was born, I developed severe ocd tendencies. One of my compulsions was a song running through my head, lound, non- stop and all day. One of my turning points came when I would wake up in the morning and for those brief seconds there would be no song and such a feeling of peace that was hard to explain Then it would begin again. I recovered fairly quickly, but it was miserable for those first few weeks. You definitely might be on to something here..