Here's a handy dandly litte chart that will help you determine the difference between really wide-awake and you know--- death.
According to the information provided I should be safe If I limit my coffee intake to less than 90 cups per day and keep my Monster consumption under 60 cans. I'm not too worried.
How much caffeine do you consume on an average day? What's you preferred method of consumption, coffee, energy drinks etc?