The other night while I was brewing I asked my "helper" to place the yeast smack pack in the house where it was warm and put the LME in hot water while the grains were soaking. When it came time to add the malt I noticed that the malt was still very thick. Upon further inspection I saw that the yeast smack pack had been submerged in hot water for approximately 60 minutes. I took the pack out which had slightly swelled but not fully. When it came time for the yeast the pack was the same size. I had no other options so I added the yeast assuming that it had not had enough time to activate. here it is two days later and there is no signs of fermentation, no gas, no foam etc. Is the batch useless at this point? Can I add a fresh pack of yeast and save the brew? Please help!!!