I brewed this 1 week ago, followed the recipe to a T as much as possible, got an OG of 1.065, so thought was perfect, pitched safale -05 yeast after aerating, did not make a starter, and set in a room of 66/67 deg F, so only a couple degrees warmer than the recommended 62-65. Well, it looked great, smelled great, and the airlock was bubbling like crazy for the first 2 or 3 days, but has not really bubbled at all since. Is this normal ? Is it possible that most of the fermenetation was done in just 3 days ? This is my 3rd attempt at all grain.