Dude you're not looked out at all, you showed no signs for all this time and likely didn't change much from the routine so I highly doubt it's lockout, you're coming up and the finish line they're going to start drawing the last bit of nutrients they can from the ends of your leaves all 100% natural, don't add anything or change your routine, stop feeding period and start flushing with ph water, wait chop, dry and enjoy....They're 100% ok