Water under iphone screen. Not dropped in water.

[sarahe35953]

There's a lot of water under my screen, but I did not drop it in water. I'm really not sure how water got under the screen. The phone randomly turns on and off, but when it stays on it works. The only problem when it's on is the buttons push themselves sensitive I've checked the water sensor. It's still white, no pink or red. I'm really not sure what to do.