Spn S3 finale tonight. Eeeeep.

I'm not looking forward to the season finale tonight. I'm actually fretting about it -- I'm worried that I'm going to be 1) disappointed, in part because the finales for S1 and 2 were really good and what if this one doesn't live up? or 2) left hanging, which would stress me out or 3) there's not going to be a happy(ish) ending, which I want so much OMG.

(I'm totally unspoiled, so please don't spoil me if you know anything!)

Eeeeeeeeep.