the one where I blow off steam about crap

I'm mad right now. in one of my classes we have a group project where we basically are a team playing a game like Risk. it's for extra credit. easy right? except it's a group project where inevitably one or two people do all the work. I'm one of those people. and I'm already pissed about it. I have no time or tolerance for that. I want and need the extra credit so I am actively working at the game. no one save a few people (2) are trying. I got so irritated that we missed making a move that I sent the professor an email and posted to our group that if you don't want to participate to let the group know and if I don't hear from people by 3 hours before when the move is due, I would be making it and that was that. yes, it sounds like a bitch move but we're adults. I refuse to carry 5 or 6 people and let them get credit when I am just as busy with the same demands. if you aren't a team player then get off the team or let me know so I can help you. I don't mind. but if you just sandbag in silence, I'm not doing that. and I'm going to not be nice about it. maybe tomorrow I'll feel better but right now I'm pissed and short tempered and not very amenable to sorriness.