Our goal difference gives us an extra point on Burnley. If they lose to Tottenham (likely) and Newcastle (the same Newcastle who are shit away and beat Sheff U 8-0) and we somehow get a point from Sheff U and Chelsea, then they'd need to beat us about 7-0 to finish above us. This being Forest I suppose that isn't inconceivable...
Anyway, the Sheff U game is vital on Saturday. A win there and we'd be almost safe and Burnley will probably be out with it.
Luton are the bigger threat; they could easily take something from Everton whose season is effectively over.