hi all. brewed last monday (ipa), pitched, everything went fine. checked on it 2 days later and it was obviously fermenting. however, i do not have a temp. controlled environment, and we hit a colder spell since i checked it last wednesday. so, the fermenting temp has dropped from ~68 to ~63, and has been there for roughly the last 5 days. i popped open the lid, and there is barely any sign of krausen or fermentation at all now. am i screwed? do i just give it an extra week? can i put my bucket on top of the heater vent for a little bit to kickstart it? thanks!