Ach man, don't fret, they will be fine, and will still give you a decent yield. One thing about the OG Kush I have grown, there is not a great deal of foliage on these so don't be pulling any of it off.
MISCONCEPTION - Removing fan leaves help a plant...absolutely not true, photosynthesis occurs in the fan leaves, they are there to create carbo's etc for your plant to grow. Even if they are blocking a bud, I WOULD STILL NOT REMOVE. Why? well becuase that fan leaf that is blocking the bud is probably a feeder for another bud, or even the bud you are trying to expose to the light. Plant looks green because they reflect green light spectrum, where your plant looks green, photosynthesis occurs the most (i.e FAN leaves). Ok, now that I have calmed down, lol. Here's what I would do (and I have grown OG kush's for years)
Kush strains come from the Kush Hindu Kush area. A friend of mine who lived in Pakistan had kush plants growing outside his house wild, and they grow massively stretchy (easily past the seond story floor). That's just the genetics. Now when applying the grow to inside you need to try and overcome this problem. You are still well within time for training these ladies. I train all the way through flower with my OG's and Kush related strains. They still look reasonably thin so bending them is NOT going to be a problem. Stick a stake or pole into each pot. Take the top of the plant and just gently bend it down and tie it off. You are effectively creating an arch, just like Macdonalds, but it's a Kush arch! This will start to strengthen the stem and also start to create multiple top colas for you to grow. As they stretch, train them as needs be.
Near the end of the cycle, reduce your lights if it is getting to hot. Ideally even heighten the distance between the kush and the light. They like cold temperatures. If possible try to get them dropping at least 15degrees overnight to peak daytime temp. This should also bring out some nice colour ranges in your plant.
Good luck with it. And happy growing.
Peace, DST