Last night a glass of water fell on my closed mac laptop. I turned it off but now it wont turn on. HELP!?

I do not know what to do. Is there anything you can suggest! My mac is my joy I have never done anything to it. I dont even know how this glass of water fell on it. It was in the middle of the night. but my computer was on sleep and was closed. please help i am miserable without it!