Your options are perhaps limitless. I would suggest that before you decide on anything, ask yourself this one simple question: do you like solving tricky problems... brainteasers.. jigsaw puzzles? Programming is a lot like all of these activities combined and "on steroids."
Do not go back to school until you have at least established that you like this sort of thing, that you can be good at it, and that it can compliment your career (or at least make a fun hobby). It'll just waste your money and your time and speaking as a former University professor, it is disheartening to see a student struggle who simply doesn't have the aptitude or interest.