when?

Note......
just finish my exam and i am very tiring.
but my mind still can't rest
there are a lot of too many things to worry don't know when it will be end
should i put as let it be.....
not sure what to do.....
i don't want to hurt other n wann help out , however sometime i also hurt myself for doing all these
am i too slefish.....
anyway thanks to someone who ever understand me, stand beside me and encourage me all the way