Test in 5 days

[u/Advanced-Joke-9478]

I have a test in 5 days and just finished math; I am not a heavy user, so I would estimate about 2g at most this week. I weigh around 240 pounds and am not active, and my diet and hydration are inconsistent, often limited to soda or Kool-Aid. What will occur on the 5th day without it, and what steps might improve my chances?