Hey there, so topping the plant will slow it down initially while it recovers. Like athos mentioned the night temp is a little bit low, if that can bump up even to 65 that would help...but closer to 68+. Try attacking a couple small changes, temp, humidity, pot size(if you think its getting trapped in there) and maybe raise your light just to see if it will stretch upwards, or increase your light. Good luck, patience is so hard in cannabis for me, I feel your pain. Why can't they just grow like weeds! ✌️