I brewed an all grain batch(dry stout) OG 1.048, 13 days ago, I used Nottingham, after 3 days fermenting the room where it was went very cold so I assumed it went dormant. I made a gravity test(1.024) and moved it to a warmer place, today I made another gravity test, the result was 1.021 the temperature is 64F. I know that you recommend to give it time but I am a bit concerned because I've read that notty is very fast(also last time I used notty in 3 days the fermentation was done 1.060 to 1.013). What should I do? give it more time?