Not able to play minecraft

I was playing on a creative server on Minecraft when i decided to go onto full screen. (i was on the download). usually it would go straight to going into full screen but this time the screen went black and i had minecraft saying it had crashed. My first instinct was to restart minecraft so i took down minecraft and reopened it, only to see when i logged in it went straight to a black screen and saying minecraft has crashed again. Then i decided to restart my laptop and go back on minecraft. i tryed both the download and the browser and both did not work please help !