It's normal during flowering to see some leaf droppage and nutrient deficiency, some ppl actually prefer it as it flushes out a lot of the nutrients and tastes better depending on opinion. You really wouldn't want to feed her at this point in the game unless she's on her last leg, just let her finish. As for drying you don't have to worry about them getting the slightest bit of light, as long as they're shaded and have a little airflow and medium humidity they'll be fine. As far as bud mold and rot just keep an eye on them and if you see any remove the infected buds carefully as to not spread the spores. Many of us hang our buds/branches/plants upside down, it seems to aid a little in the drying and it's just plain convenient. You'll be fine man. If you need any tips on curing there are plenty of good, simple techniques out there just search the boards or google it. peace