First Round Interview with BB on Friday HELP!!!!

I just received an email today about a first (of two, second would be superday) interview I will have with a BB firm on Friday. I applied for this in late October and forgot all about it. I kind of given up on it prior to this because I figured I would have been called back by now. I have two tests and a project due on Friday and am freaking out. I honestly think I'm screwed. Any advice would be helpful. It is for a summer rotational program with S&T, PB, and IM.