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So I'm in college right now and we have an upcoming middle-of-the-night fire drill when we have no idea will take place. I just know its coming up because they told us. I go to a very small college so they're able to track all of us students. Anyways, no one here has seen me without makeup and recently my skin has been breaking out like crazy, with red pimples everywhere. I think its the blaring redness that makes it look the worst. I am well known around campus and usually confident when I have makeup on. But since I will be woken up in the middle of the night having to rush outside with everyone, they're going to see me with my acne cream on my pimples and bare faced...I'm just needing some tips on how to possibly mentally prepare myself for this? I know when people see me they're going to notice how bad my skin is without makeup which I've tried so hard to conceal 
Yes - for just this one night, I think you might consider wearing some concealer to bed ( if you end up falling asleep anyway!). It will likely be dark, or darkish - so you probably don't need to put on a full face (which will look strange anyway). Just make sure, as soon as you get back to your dorm to wash it off before you go back to sleep.
You can just wear some concealer instead of full blown makeup so you atleast look more natural and arent clogging your pores with product at night time. If anyone notices just say its antibacterial anti acne healing concealer +@%#?@& (think of some health excuse) but honestly i doubt that anyone will care dont worry about it 
You mentioned you don't know when it is - I think you would have time to put some foundation on. And try doing your eyebrows every night this week before bed as eyebrows are the windows to our soul.
Keep some heavy duty foundation and one of those make-up sponges next to your bed and once you hear the alarm pretend you're on America's Next Top Model doing a quick-change.