Despite a large amount of opened and half-empty cups of noodles and soda.
This is a sentence fragment.
I'm not quite sure what "long-ago" homework is. Homework from long ago? Homework that was due long ago?
Yeah, the "she" problem that's already been pointed out.
"Seven solid days to do jackshit" you murmur as you roll to your side to watch outside through the window.
Comma after jackshit, also I feel like this is a really long sentence for no good reason. The ending part could be shortened to something along the lines of "as you roll to your side to stare out the window" or "as you roll over to look out through the window", to declutter and just to make more sense.
I would just completely rewrite that last paragraph. There are sentence fragments and run on sentences just covering it.
I'll give you an example:
"There is nothing out of the ordinary; a bird is in it's usual spot on the lamppost outside, a car is rolling by. Occasionally some of the other people in your complex run by- you recognize one group as freshmen from your college. They're most likely high on adrenaline, doing the kinds of things that stupid kids do. You close the blinds, but the only difference it makes is blocking out the lamppost's light. There aren't even any stars shining outside.
You lie in your bed, wondering what on earth you should do now."
Also, you probably have mentioned before now that it's nighttime.