I am brewing my 1st batch of beer. The directions said primary fermentation should be 10-14 days. I'm at 9 and have had no activity today or yesterday. I have been reading mixed things, one saying let it go the full 14 before starting 2nd fermentation & the other saying to start 2nd fermentation after 2-3 days of inactivity & sitting too long w a yeast cake at the bottom is bad. What do I do? Please help!