It's important to listen to your body. Really. Whether you run or not, listening to your body (and mind) and choosing whether to take a rest day (a day of chill) or not is so essential for your longer term health and happiness (and lack of injuries).
I know, it might seem like time is running out: you have 'x' amount of hours in the week, so must use them efficiently and effectively, and get ALL those things done on your ever-growing to-do list, but really, what's the worst that's going to happen if you take a day off? Watch movies, read, eat biscuits, snack on fruit, nap, sketch, write, nap some more: do whatever it is you need to do to recharge your batteries for the week ahead. After all. The choice is yours. Always.
While you're having this day of rest, why not head on over to sign up for my Eat To Win program! Nourish your body through food AND rest, to get your best body yet (feel great / look good / perform at your best!). Sign up here: http://lousweight.com.au/main/page_eat_to_win_challenge.html