Yes I did have some co2 choking .. Timer went bad and selinoid was turned on over nite plus 1/2 of next day.. Taking care of issue. Plants slowly recouping.your flowers are the buds looks like you got some stress in that third pic
You are good..... 3 weeks into flowering. Any question it may arise, be prepare cuz ill be bugging the living knowledge out of you ....you know ur sh*t.Flowers don't convert into buds, flowers are buds. 6-10 weeks until they're done. Judging by the way yours looks. I'd say you're about 2.5-3 weeks into 12/12