Trance Song

Trying to find a song I heard awhile back.  I don't know the title or the artist and am only 90% sure that the snippet of lyrics that I remember is accurate.  It's a vocal trance song.  Here's what I remember:
"in my head, in my head
.....and they say it's all in my head"

Anyone know the song I'm talking about?  It's been driving me crazy for about a week.

its not a real song <spoiler>its in your head</spoiler>