I have been going though a phase some unwanted thoughts keep striking my mind now and then...it was something personal related with broken trust and promise. But i never let them to disturb my sleep....i take a good tight sleep at night.....in beginning the thought came back to haunt early thing in the morning...but i slowly coped with them by distracting myself with other stuff...now after reading this, it came back for a while but writing this comment help in letting it go.