OG West Coast

No over feeding but a deficiency. You are growing in coco with no extra cal mag , make a Google search and type "cannabis coco growing" and the 1st important thing they'll told you is to grab a bottle of cal mag because this medium have none of them and they are crucial for the plant. You see the yellowing between the veins starting at the bottom of the plant ? It is the early stage of the magnesium def. Check you input and output ph , it could be one of the keys of your issue. About the flowering it can be induce by the age of the plant or the size of the pot ( for autoflowering plants ) so be patient and it will happens soon