What song and if you know the artist as well goes:
"Everything will be alright. Everything everything will be just fine."

It's either Jim Eat World - The Middle or Sweet Water - Everything will be all right

There's a lifehouse song called everything which features the lyrics, everything will be all right, it's the last line before a short insrtumental ,it's a slow song with a rocky-er chorus if that helps

Possibly "Believe" by Yellowcard maybe?