Just starting your third node? No Way. Look i started out with 3 plants, i topped this one here, waited a month to see what it did, topped her sister, waited to see what she did and the other one i left.
What i gathered from this "Topping" is that you take the top single main cola off the plant, allowing the two cola's inbetween the node right below that to now be the top cola.
Thus ... Your two.
Now the first one i topped, Didn't grow shit. I come to believe i topped it way to early. Like a couple weeks older than yours, but still to early.
So, - I'm no professional So i could be wrong. I'm just now harvesting my first grow... But this is what i've learned.
I would wait.