Wow, not so good advice here. Is this your first time growing? I've grown 2 autos now. While neither of them got the amber/cloudy ratio I really wanted, they were still pretty good at harvest. You need to be patien or you're going to screw up your plants. 1) Do 20/4, that's better for autos. 2) They're showing pistils, which means they're flowering. Going to 12/12 WILL hurt your yield. They will start to turn orange and then bulk up. It sounds like they're just now starting to turn, give them some time. Buds dense up in the last few weeks. 3) Do not trim. If you wanted light to get to lower bud sites, you could have done LST, but it's probably too late now. Just chill man, let them do their thing. Check out my grow in my sig if you want something to compare to, especially my 60 Day Wonder (turned out better).