I think i broke my iphone? Lol?

Okay so today i dropped my phone and when i looked at it it had this little color lines on the bottom left side of the iphone 4 then it turned like a solid gray color… I checked but there's no visible crack on the surface but under the screen there's a horizontal line and thats where the gray lines start… What do i do? Can i get it replaced? Is it the lcd screen or the pixel thing?

Yes, you can get it replaced but it would obviously cost you money. Take it to an authorized repair center and they will fix it for you.