go see your ophthalmologist as soon as you can.

When I had optic neuritis, it hurt so bad to move my left eye side-to-side that it actually caused me pain in my neck and shoulder. (not sure how the optic nerve would do that, unless it's referred pain) but the whole description you give reminds me of what things felt when I had ON for the first time.

Even if it's not ON, it never hurts to be sure. One thing I learned from having optic neuritis is that you never ever mess with your eyes. Go get it checked.