Caffeine Overload

My 2nd of 3 night shift. I think I would need it all to keep me from falling asleep tonight. Just had 2 hours of sleep before I came to work. I was out with mum earlier driving around looking for a replacement car. To top it off, I need to receive the medications for this month's cycle sir to start tomorrow. I have a long night ahead of me. I need to keep myself awake.