Getting Error -2002F on my mid-2012 MacBook Pro

So about a week ago I upgraded to Yosemite on my MacBook Pro and thought everything went fine. However Saturday night I opened up my laptop to use it again after about five hours of inactivity and I had a screen white screen with a folder containing a question mark. I tried doing Internet recover by holding Option, but it kept failing and giving me Error -2002F. Eventually I got it to work a couple times to the point where I had the options to browse for help online, install a new OS, try to repair the disk, or boot from a saved memory. I wasn't too sure what to do here so after a while of playing around I gave up and closed my MacBook. The next time I opened it, it actually started up and was working fine for about 12 hours until I ran into the same issues, like I was afraid would happen.

Basically, I'm assuming putting Yosemite on it messed something up. I'm pretty sure I was running Mountain Lion before, because I had never changed the OS it came with. Now I'm not sure what to do with it and really don't want to lose all of my files to get the computer to work once again. Any other posts I've seen about this error stem from different situation, such as people trying to wipe their MacBooks to sell them, so I'm not sure if solving my problem will differ any. Thank you for any help, please let me know if I can clarify anything else further.