Macbook Pro 13in 2011 Boot up

Hello,
So, for some reason whenever I turn my Macbook Pro 13in 2011 on, the normal white screen appears with the Apple logo and the little loading wheel, but this time a gray bar appears loading on the bottom of the wheel, could someone please explain what is happening, this is making my laptop load up very slowly. I'm scared I might lose everything.
Thanks, please get back to me,
IMAC2296

The following support article is somewhat outdated. Where it refers to booting from an installation disc, you should boot from your recovery partition (if running 10.7 or later) by holding down the key combination command-R at the chime.
Mac OS X: Gray screen appears during startup

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  • I have a MacBook pro late 2011 version it's not booting up so I am trying to boot from a USB recovery drive but when I select it nothing happens it jus goes to the restore options

    I have a MacBook pro late 2011 version it's not booting up so I am trying to boot from a USB recovery drive but when I select it nothing happens it jus goes to the restore options

    Bahamaguy wrote:
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