Coffee High

the effects of too much coffee today. had people over at our place today coz it was Anzac Day and somehow i ended up drinking like 3 cups of coffee and 2 of them in a row just before dinner time. and now, even though it's past midnight i'm still wide awake and pretty edgy. not in an irritable way though...just full of energy.....the feeling of being able to stay awake for the next couple of hours without feeling tired or sleepy. this is not good....need to wake up at 7 to get to a long day of work. should i keep studying or try and go to sleep?