Economics of Priority

I was in class, I wanted to finish my assignment so I could, I don't know, use the rest of the class time talking to my group. In the middle of my march down the finish, I was held back by some fool. Though, he did have good things to say, his explination of things were a little hard to follow and I was too lazy to go ahead and try to understand him, as I normally would.
This ended up with a discussion with the proffessor about it, and led me to get a wrong answer.

It didn't bug me so much that I had gotten an answer wrong in economics but it floods me with different ideas.
First, this leads to the guy thinking he's smarter, harder, and wittyer than I am. I'm not saying that this isn't true, but the arrogance factor in the equation bugs me. and to top it off he now has a fucked up concept of what we were studying. I feel responsible for this.

Second, I feel responsible. In this group it seems like I'm the only one that can give clear answers. Clear enough that everyone understands what I'm trying to say.

Third, this pisses me off because if I had just studied a little, or at least took the time to understand the same concepts, we would have been okay, and this deuchebag would at least take the time to take me into consideration.

Fourth, I need to get my head in the game, but I still have stuff to sort out. Different things were swarming my head. Nothing according to the class. Nothing that can even affect me as much as not getting an A in my classes.

I still feel distracted and not myself.