Im making a batch of pumpkin ale and used wyeast 1272. I activated pouch 2 hrs before pitching to the fermenter and it swelled a little bit but not too much. Its been 12 hours and nothing has happened at all. My wort took 1.5 hours to chill due to lack of ice, but i dont think that is the problem. My question is how long do i wait, and if nothing happens can i go purchase a new yeast pack and add this late?