Yep, get the hops in the freezer even now. Since they were sealed they should be ok.
The grain being also sealed and in the fridge may be ok. If your planning on brewing soon I would just open the bag and chew on some to see if it still tastes fresh. If it's soft or doesn't taste fresh, then bin it.
Check the dates on the yeast packets. Dried yeast in the fridge may still be ok.