Hello. I think you can save this easily. There may be lots of issue but first you understand your plant and determine whats wrong.
1- overwatering, how many times you give water your plant
2- oxygen - how about it? Under 125 cfl is okay but i dont know
3- Nutriens - whats nutriens...
Feminised seed grow takes long time than autos. Vegetative stage between 30-40 days then you can change light schedule as 12/12 to start flowering stage but this part is longest one. When it comes to feminised seeds flowering day 1 to harvest takes approximately 7-10 week and for BigBag this...