Brought a Wyeast packet out of the refrigerator about 3 hours ago, felt a bit puffed up already. I just went to smack it, but the nutrient pack inside felt inflated and stiff. I thought a few smacks might bust the nutrient pack and everything would be normal, but its not busting, now the nutrient pack just feels mushy. Could the nutrient pack have been ruptured when I brought the pack home a week ago, and the yeast have been going to town inside the pack since then? Should I be worried about bad yeast?