Let my pack wyeast 2112 sit in the fridge very cold near freezing for a few months unsmacked, 30hrs ago i smacked/shook it let it sit in room temp for 5 hours and no swell. Is it recked? did i kill it or is it just to old (10 months) I pitched it anyway, i will wait 72hrs than if no fermentation i will buy another and add it. How does this sound? fermenting at 15 degrees C, the lower end of recommended.