Hey Saki, welcome back!
Songs that come to mind for me are R.E.M. - Losing My Religion
Also Natilie Imbruglia - Torn (about the end of a relationship, but still some of the lyrics seemed appropriate - "I'm all out of faith, this is how I feel / Illusion never turned into something real")
Let It Be is a good one though Andre. Sometimes I feel the need to take a deep breath, listen to that song, and let it all go for awhile.