Dont worry about it, I started wearing insoles for my arches in university. Good support makes all the difference in the world!
I've also started eating well this week! I haven't packed anything totally bad for me, and I've made a few leafy salads or pasta dishes. I've been drinking 1% milk instead of pop and a lot more water.
And I've been having this weird craving for liquored-up cheese! It's the strangest thing... ;D