when i turn my macbook on it does the white screen with the spinning wheel and then goes to the blue screen but it gets stuck on that screen for about a minute or two and goes to my login in screen any idea whats going on with it i have not changed anything but the other day i was turning it on and there was a bug on the keyboard and i went to kill it causing my to press some random buttons during the start up and its been doing this ever since..PLEASE HELP