what is the best coffee drink to get the most amount of caffeine?!

Espresso.
Try Black Tea though. It contains more caffeine than coffee.
I totally understand what it's like to pull all nighters. Doing the same right now.

don't pull an all nighter-- your brain cannot retain the information the night before a test. It functions best with sleep. If you didn't already learn it, you won't now.

If you need a jolt, get a redbull or other energy drink.

you can just get any drink really and dump a whole mess of caffeine shots in it. mooch off of 7-11. i usually just drink the shots by themselves rather than an actual beverage because then i'd have to go pee.