You've got a pretty intense infestation of thrips or spider mites... even if you can't see them! And it doesn't matter which it is so don't obessess with trying to figure that out... just grab yourself either some Spinosad or some Dr. Zymes Eliminator and use as directed - both will kill adult thrips, spider mites, aphids, whiteflies AND their eggs/larvae... both are organic and safe to spray through harvest... do not use neem oil as you are in flower and you don't want that oil on your buds - and it's not that effective to begin with!
Good luck!