Omega... how is she? If the leaves are limping above the snap still all may be lost by now... Technically you can completely sever the top off of the plant, realign it, splint it, and tape around it... and within a week or two should have healed up with a nice brown and thick knuckle. It has been said that this will increase interior wall thickness at this area, and will actually strengthen the plant anyway (it will obviously stunt the plant, and will be take an extra week or two to mature [because of the healing process], but will be stronger than it was before it snapped).
It sounds as if it snapped almost completely off, hanging from the exterior pulp of the stem... this sounds very bad... but as long as you fixed it very fast it may survive. At worst it will be a top, and you'll lose whatever broke off. The roots underground are still supportive of the larger plant, and the recovery should be quick.
Next time, pinch the main stem above and below a node... crush your index towards your thumb, about 50% inwards... and make two 90 degree bends. Support the now downwards facing stem with either a stick or a piece of tape connecting it to the other stem in a parallel fashion.
Good luck!
