Is my Nikon FE broken?

I just bought this camera the other day from B&H. I worked fine so i took it home and now when i press the shutter release button the mirror flips up, and because of that the viewfinder stays black and the picture is never taken. Also the advance-film lever isn't working, like its locked in place. I have a battery and film in the camera, i've tried settings on manual and automatic, i have NO money to get it repaired, and B&H is closed until tuesday. The problem is that my photoshoot is due on monday, can someone please help me out? Quick fix? Anything?

Sounds to me like it may be on a too long shutter speed. Have a look at that