race to your nearest store and buy 2 popsicles lol lick them up and then wash them place them on either side of broken stem if you got any rooting compound or gel put some on it you then use saran wrap and tightly rap up your stem around popsicle sticks i think that would work monitor it for like a week if you see her starting to droop then you might as well cut it off you damaged the vascular veins