I have to wake up in about 4.5 hours to drive 30 min to turn in a take home test that I should have finish already but haven't
Are you going to get any sleep?  Why haven't you finished the test?
No time for sleep, I just want to get this all done.
Studying last minute can lead to complications if you passed off all your course work until the last minute. You should get some rest so you are not tired for the big test.
I can't reschedule the test and if I don't do well, it can ruin my GPA.
It's too late this time, but it would be healthier to get in the habit of doing schoolwork without procrastinating. Doing all your work at the last minute means you're never doing or feeling your best.