How long does it take for an energy drink to go through your system?!

In the last few months I have completely cut energy drinks put of my life, because I know how unhealthy they are. Now please skip all the negative stuff. I know this was stupid and no, I'm not about to do it again. But I was feeling rather tired around 3pm yesterday afternoon, so I stopped at the store and bought a rockstar roasted energy drink. All was fine until 9pm or so. I started feeling dizzy and sick to my stomach. Now here it is 4am and the symptoms are terrible. Just wondering how long will it take for the drink to go through my system, and if there's anything I can do to speed this up? I need sleep! :) any help would be appreciated!