Eye discomfort, blurry vision and my contacts keep moving around and falling out of my eyes?

Sounds like its time to take a trip to your eye doctor. I have known patients that have worn the same brand of lenses for years or used the same solution and for some unknown reason, became intolerant to them. There are preservatives in CL solution that over time can become an irritant. I know yo also said you are using re-wetting drops, but how often. Minimum you should be using them 6xday. You may also be having some ocular allergies. Even if you normally don't have seasonal allergies or sinus symptoms yo may be having a reaction under your eyelids called Giant pappilary conjunctivitis that can make contact lens wear almost unbearable (I've had it too). But good news is, all these things can be improved with prescription eye drops from your eye doctor. And please try to take your contacts out a few times a week, and give your eyes a break. Good luck.