PLEASE get your rest and don't feel bad about it! If I were you, I would start thinking of sleep and rest of part of the necessary tools of weight loss/maintenance. I have a sleep problem, and now that it is being corrected, I can testify to the fact that if you are not well-rested, it is 150% harder to eat well (cravings!!!) and exercise (energy!!!).
Please relax yourself a bit! You have done fabulously losing weight, and I understand the urgency and panic over it. But if this is supposed to be a new "way of life" and not a temporary situation, there's no way you are going to sustain it if you panic every time you need a day off running or need to attend a social event.
RELAX, and be kind to yourself. Listen to your body. If it needs to sleep in or rest, it deserves it! That doesn't mean you are a slacker, unless of course it turns into a 3 month relaxation-from-exercise fest.