So I brewed a Brewers Best IPA kit about a week and a half ago. The Original Gravity was 1.054. It did its thing, was bubbling. Took another reading on this past sunday gravity was down to 1.018. There was no activity in the airlock. At all. I thought it was done, so i was waiting for room in my carboys to move it to secondary. Well last night around 2:30 am, it started bubbling like crazy. I checked it this morning and there was another layer of krausen. The gravity was down to 1.014. Is this just the yeast waking back up, for a snack? Ive never had this happen before. Any input?