Depends on the break. If you set it right away you can create a splint from a few match sticks around the two bits of stalk merging the broken ends back together. Apply a few dabs of cloning hormone if you have it. It's like setting a broken bone. Then you bind it gently with string or a twisty tie around the splint so that it holds in place. Give it a week or two and the plant will grow back together. It is the same concept as grafting two plants together. It is best done immediately but I'm guessing it might work up to an hour after the break so long as the stalk does not dry out. However, I'm not sure that this would have worked in your case. It sounds like it was root damage. If you had an aero cloner I'd say stick her in there. At the very least you want to put a humidity dome over her so that she does not expire more water than necessary.