Phone fell, WACK inside screen HELP!!!!!?

I was at my mothers store in the parking lot, i did a cartwheel, and my phone fell on its backside, and hit the ground. (LG envtouch) when i opened it the top part above the texting keyboard was all wack, i couldnt see anything. The front part was fine, but not the inside, the screen itself is not cracked but idk what happened to it. Somebody please tell me how to fix it THANKS!