Applications :: IMovie All Messed Up - Won't Play

all of the sudden after restarting my computer it wont work. I can't play the project i was working on, and i cant get the little red bar to move across my project. I have to like, visit my project library and then go back to my project to get the red bar to move, but then when i try to play it, it wont play. One time after clicking around a lot i got it to play, but only the sound played and none of the video previewed.

NOW when I go and do things to get it to play, instead of playing my song that I put to go along with the movie, it plays random songs from my itunes or random songs from the videos i used to make my video. So what the hell is going on here? Edit;; I just remembered- I was working on it fine last night at around 11, but then I went out with friends and left my laptop open. I came back and my computer was logged out, and some bogus amount of *****'s were typed in to the login like someone was trying to get in it (I've got a roommate, i'm in college) also, my laptop was shut, when i remember leaving it open on my bed.
So did someone like, get on and totally **** up my program? is that even possible?