I forgot to put the sleeve in the frig and left it out over night after I opened it.  Is it still good?

i think so -- can you call the place where you bought it?  most of it is shelf stable 

YES.

Yes it's fine.  I leave mine out all the time.  I wouldn't leave it for days, but overnight ... it'll be fine.

 I put it in the frig and tasted it today and taste normal.  Thanks!!