Amanda, why don't you just make yourself a good old fashioned turkey sandwich on whole wheat bread for lunch? Or any other non-processed meat? Make it the night before, stick a piece of fruit in the bag, and you're done. Or make a big salad full of veggies/beans on the weekend and use it for lunches, adding in other stuff?
I notice you drink soda for caffeine. Have you ever tried tea or coffee? One cup a day wouldn't hurt you, for sure. Even a teeny amount of real sugar in it would be better than the fake stuff.
My close friend and riding buddy drinks tons of diet soda and is crazy about using fake sugar; won't touch the real stuff. The rest of her diet is pretty good. I want to tell her to quit the diet soda, but I am afraid she will not take it well.