So I just brewed a pale ale on saturday. OG was 1.054 and pitched two vials at 70 degrees. It is sitting my basement bathroom that is unused and it fermenting at 68 degrees. It's been 5 days and went to throw in my dry hops. By this time the yeast has fallen out but to my suprise I still have a good amount of krausen sitting on top of my beer. Is this normal for the yeast? The other times I've used this yeast it has fallen out by now. I haven't taken a gravity reading yet so I guess it could still be going.