what the hell is going on with my leaves

I'm in the 5th week of flowering and the buds look good, but the leaves are curling up and turning yellow. others are developing bluish spots and curling up as well. i've been leaching the soil about once per week and i don't see any improvements. i don't have any pictures to offer and i don't want to begin fertilizing again until they resume normal growth. does this sound like an excess of deficiency of any nutrient, potassium? please help me.

i think the plants just going through its life cycle... before you harvest you should have few to no fan leaves because of this

yeah i hope that tis is the case, the leaves on one plant are curling up around the bud calyxes. the little leaves around the buds are turning brownish, curling up and getting right crispy. thanks for the info though