laptop error with keyboard?

[Elm]

my keyboard has messed up, when i type the letters l,e,h and k, it takes the words to the next line and also its like its pressing the enter key at the same time. also a couple of my numbers put hashtags infront of the number.also the ctrl+c button dont copy it takes me to a different internet tab.im hoping i have pressed a couple of buttons together meaning that its made my keyboard this way rather than it meaning my comp is totally screwed.lots of help needed pleas