I've looked through your diary and you're right, everything seems to be ok there so I would suggest you might want to add a PK booster to your nutes - something like GH's KoolBloom liquid or even their KoolBloom dry since you're coming up on the harvest time (usually, you don't start the dry formula until two weeks before harvest but in this case, it's kind of silly to buy and use the liquid for one week before switching to the dry). That ought to help bulk up your buds. Beyond that, I'd lay the issue down to one belonging to this particular strain - it may not be one that gets enormous buds.... and I've grown a few like that - very disappointing... (and no, your plants have NOT been pollinated - put that right out of your mind)
Good luck!