1. All of my custom classes had been reset
2. I was getting around 10FPS.
I did a restart of my computer and loaded up the game again. Clicking on 'Campaign' reveals that all of my Campaign time had been reset to 0%, with all of the 'extras' showing 'locked'.
All of my Multiplayer dog tags and unlocks/assessments are still there, which is lucky.
Obviously my Profile has been corrupted somehow. Is there a way to get all of my Campaign time back (Without having to play it through again)?